Sharp EL-9400 Specifications

Graphing Calculator
EL-9400
TEACHERS’ GUIDE
Introduction
The EL-9400 was developed to meet the needs of an expanding
education market and is based on three concepts: easy to teach,
easy to learn and easy to use. The EL-9400 has been designed
with simplified operations and time-saving features, allowing
teachers to concentrate on actual teaching.
This manual was designed to introduce teachers to the unique
features of the EL-9400 using detailed operation examples.
Built-in slide shows
Educational tools
(OHP/PC-link/Data collection)
Easy to Teach
Contents
Easy to Learn
Easy to Use
Shift/Change function
Equation editor
Split display
Large display
Rapid graph
Rapid window
Rapid zoom
Sales points
Basic operation
Equation editor
Features
Shift
Change
Slide show
Slide show selections
Graphing procedure
Rapid graph
Rapid window
Rapid zoom
P1
P2
P4
P5
P6
P7
P8
P 10
P 11
P 12
P 13
System options
PC-link system
Set to set communication
OHP system
Menu tree 1~6
Specifications
P 14
P 15
P 16
P 17
P 23
EL-9400 Graphing Calculator
S ales points
1
Large 96 x 64-dot
display
2 Graph Shift/Change shows
how "changing" the graph
affects the equation
3 Slide Shows reduce class
preparation time
4 Equation Editor shows
equations just as in textbooks
5 Rapid graph/Rapid window
simplify graphing procedures
6 Rapid zoom allows easy
adjustment of window size
1
EL-9400 Graphing Calculator
Basic operation
Power ON/OFF
○
○
○
○
○
○
○
Power on
Function keys
Y=
Use to enter equations
Use to draw graphs
○
○
○
Power off
Use to view table of function value
Use to set size of viewing window
CL
○
○
○
○
○
○
Erase equations and
remove error displays
Use to adjust the viewing range
Use to trace graphs
QUIT
CL
○
○
○
Use to enter calculation mode
Cancel of previous
function (Escape)
Use to enter slide show mode
EZ
Use to operate Rapid Graph/Rapid
Window and Rapid Zoom functions
Names of parts
5 Display screen
1 Graphing keys
2 Power supply ON/OFF key
3 Alphabet specification key
4 Secondary function
6 Cursor movement keys
7 Clear/Quit key
specification key
8 Variable enter key
9 Calculation execute key
10 Communication port for peripheral devices
2
EL-9400 Graphing Calculator
Basic operation
Guide to key use
Press
Press
to use secondary functions (in yellow).
to use the alphabet keys (in blue).
SET UP menu
Press
SET UP
.
• Contents displayed on the right side of
the screen are the current settings.
Example:
To select “sin”:
To select A:
]
To select “sin-1”:
There may be differences in the results
of calculations and graph plotting
depending on the SET UP settings.
]
Adjusting screen contrast
Reset function
• The contrast adjust screen will appear
when pressing
1) When trouble occurs
Press
to enter the reset mode.
.
Press
to lighten contrast.
Press
to darken contrast.
• Use this function ( 1 or 2 ) to return all
settings to the default value or to delete all
data.
2) All RESET operation
• If trouble still occurs, proceed as follows:
1. Press the RESET switch on the back.
2. Press
.
• Returns to the initial display.
CAUTION
Do not press CL in step 2. It will delete all data
stored in the calculator.
3
EL-9400 Graphing Calculator
E quation editor
The equation editor allows equations to be viewed just as they are written in textbooks. This
increases student comprehension and allows mistakes to be found quickly.
Example
Input the equation and see how it can be easily
viewed with the equation editor.
Display
Key Operation
Notes
Clear the display.
1
CL
2
3
4
(or
6
0
a/b
2
X/T
a/b
X/T
Select CALC and
(Integral function)
)
Enter the range of the integral.
1
1
x
Enter
2
Complete equation input.
5
6
4
0
7
)
Calculate the expression.
]
(or
The blinking mark in the upper right
side of the display indicates the
expression is being calculated.
]
Features
EL-9400 Graphing Calculator
Shift
(Change the location of graphs)
Graph shift function helps students grasp the relationship between an equation and its graph.
Shift the graph’s location without changing its shape, and the change is immediately reflected
in the equation on the right side of the display.
Example
When the graph of y = x2 is shifted downward,
how does this affect the equation?
1
SHIFT/CHANGE
Display
Notes
Enter SHIFT/CHANGE mode.
]
Key Operation
If SHIFT is not already
highlighted press
.
]
2
Select shift. Cursor moves to the
equation menu.
3
Select the equation: y = x2 and
draw the graph.
4
Select the location of the shift:
move cursor down twice.
View the result of the shift.
]
5
y = x2
y = x2-2
]
5
Features
EL-9400 Graphing Calculator
Change
(Change the shape of the graphs)
Graph change function helps students grasp the relationship between an equation and its
graph. Change the shape of the graph, and the change is immediately reflected in the equation
on the right side of the display.
Example
When the graph of y = x2 is changed,
how does it affect the equation?
Key Operation
1
SHIFT/CHANGE
Display
Notes
Enter SHIFT/CHANGE mode
and specified ( CHANGE ).
2
Select change. Cursor will move
to the equation menu.
3
Select the equation: y = x2 and
draw the graph.
4
Select the location of the
change: increase the value of ycoordinates.
5
View the result of the change.
]
6
y = x2
y = 2x2
]
Features
EL-9400 Graphing Calculator
S lide show
Slide show assists with teacher preparation. By selecting from the built-in options or creating your own series of slides, you can demonstrate lessons with minimum preparation
time.
Example
Use the built-in slide show of y = x2 to show how the
coordinates change as you move along the graph.
Key Operation
1
2
Display
Notes
Specified SLIDE SHOW mode.
Select the built-in menu.
3
Select y = x2 and the first slide
appears.
4
Begin the slide show by pressing the
cursor key.
Moving between the values you
can follow the changes in the
graph’s coordinates, making the
nature of the graph easier to
understand.
* View the selection of built-in slide shows
on the following pages.
7
Features
EL-9400 Graphing Calculator
Built-in slide show selections
1) Y=X2
8
2) Y=AX+B
3) Y= X
4) Y=1/X
Features
EL-9400 Graphing Calculator
Built-in slide show selections
5) Y=sinX
6) Y=tanX
7) Y=cos-1X
8) Y=lnX
9
Features
EL-9400 Graphing Calculator
Graphing Procedures
The EL-9400 has three unique functions that simplify graphing procedures: Rapid Graph,
Rapid Window and Rapid Zoom. Of course, the EL-9400 supports conventional graphing
procedures as well.
Graphing Procedure
Following outlines graphing procedures and indicates the steps where Sharp's unique functions can
be used to simplify operations. These functions are introduced on the following pages.
Manual Input
Step 1
Rapid Graph
Y=
Input equation
X/T
EZ
a
b
x
2
3
X/T
2
X/T
Simply select from
built-in menu to
modify desired type of equation .
Manual Input
Step 2
Rapid Window
EZ
Set X, Y range
Xmin =
Xmax =
Xscl =
Ymin =
Ymax =
Yscl =
(–)
3
3
(–)
1
1
5
1
5
Simply select from
built-in menu to set
window size.
5
Step 3
Draw graph
Press Graph button to draw graph.
Step 4
Manual Input
Rapid Zoom
EZ
Adjust viewing
window
10
Amending
range size
Go back to Step 2 to
readjust window size.
Use arrows to adjust window
size while viewing graph.
EL-9400 Graphing Calculator
Features
R apid graph
Graphing has never been easier. With its full range of preset equations, rapid graph
simplifies equation input. Use in conjunction with the rapid window function or with any
graph created.
Example
Draw the graph for y = 2sin (-2x+ ) + 2
using the rapid graph function.
Key Operation
1
Y=
2
EZ
Display
Notes
Enter the equation entry mode.
Enter Rapid Graph mode and view
the equation-type menu.
3
Select the type of equation: Trigonometric, and view the equation
format menu.
4
Select the sin equation format and
view the sin equation style.
5
Select the second equation style and
input. If necessary, make changes to
the coefficients.
6
Draw the graph.
(Note: Previous range values may affect
the viewing window. To reset range
values, use Rapid Window.)
11
EL-9400 Graphing Calculator
Features
R apid window
Rapid window simplifies setting window size with a range of preset values. Use in conjunction with the rapid graph function or with any graph created.
Example
After using Rapid Graph to draw the graph of y = 2sin (-2x+ ) + 2 (refer
p. 11), set the viewing window using the rapid window function.
Key Operation
Enter Rapid Window mode.
EZ
Select the No. 3 style and view the
X-range menu.
3
4
(Five times)
(or 5
5
Notes
Enter viewing window setup mode.
1
2
Display
(Six times)
)
Select X-range No. 4:
(-1 < X < 10 scl=1), and
view the Y-range menu.
Move the cursor to No. 5:
(-0.5 < Y < 5 scl=0.5)
(or 5 )
7
12
Select the Y-range and draw the
graph.
Features
EL-9400 Graphing Calculator
R apid zoom
Rapid zoom offers one-touch adjustment of window size while viewing the graph. No more
guessing or wasting class time to find optimal values for window size.
Example
Adjust the viewing window for y = x3 + x2 - 2x
to show the entire graph.
Display
Key Operation
1
Y=
X/T
X/T
x
ab
2
3
2
(–)
X/T
3
3
5
1
1
(–)
1
5
Notes
Create the graph y = x3 + x2 - 2x
using the following conditions:
X-range: xmin = -3
xmax = 3
xscl = 1
Y-range: ymin = -1.5
ymax = 1.5
yscl = 0.5
5
2
EZ
Enter Rapid Zoom mode.
3
Change X-range from Ymax = 1.5 to
Ymax=2. Draw the graph.
4
Repeat: Change Y-range from Ymax
= 2 to Ymax=2.5. Draw the graph
5
View display (adjusted).
13
System options
EL-9400 Graphing Calculator
PC-LINK
Connect the EL-9400 with a PC or Macintosh computer to expand the possibilities of data
exchange using PC-Link software.
CE-LK1(PC-link system)
PC-Link
Software
PC conversion
connector for
IBM-PC
R
IBM PC
or Compatibles
PC-Link
Software
CE-450L
PC conversion
connector for
Macintosh
Macintosh
R
What is PC LINK?
• Creates and edits EL-9400 programs on a PC.
• Receives and saves programs and various data from EL-9400.
• Makes a backup of all the contents of EL-9400.
• Sends programs and various data to EL-9400.
• Loads image data of EL-9400.
• Converts programs and various data files into a Text File. Converts
program text files into a Program File.
• Prints out programs and various data files.
Procedure
1
Turn off the EL-9400.
2
Connect the EL-9400 to the PC by using the
CE-450L, PC-Link adaptor and PC connector
(see above diagram).
3
Make sure that the RS-232C (serial port) is connected
to the PC. Use of the connector is determined by the
shape of the PC serial port (see below chart).
4
Open PC Link-Software.
Shape of PC serial port
25 pin (male)
5
Switch on EL-9400.
14
Connect the other side (25-pin side) of PC LINK
adaptor to the serial
port for the PC.
* It is essential to use the same port for both the PC
9 pin (male)
Connect the other side (25-pin side) of PC LINK
adaptor to the 25-pin
terminal of a converting adaptor. Also connect the
other side (9-pin side) of the converting adaptor to
the serial port for the PC.
Operate according to the instructions on the
screen.
8 pin (female)
For Macintosh
and the PC Link-Software.
6
Connecting procedure
EL-9400 Graphing Calculator
Set to set communication
Transfer data between two EL-9400 calculators using the communication cable (CE-450L).
EL-9400
CE-450L
Communication cable
EL-9400
Communication Procedure
3
7
Turn power on.
Select SEND/ALL.
Receiver
( or
)
Select ‘LI’, ‘YI’
Specified LINK.
4
* mark desired data to be
sent.
]
)
2
Execute Sending function.
Select LINK/RECEIVE.
Sender
List of the SEND menu
( or
6
]
9
( or
5
List of sendable data will
appear on screen.
8
]
2
Plug the cable into both calculators.
]
1
( or
)
1
Specified LINK.
)
A SELECT ....................... Sends files individually as described below.
1 ALL .............................. Selects and displays all files.
2 List ............................... Selects and displays all list files.
3 GraphEq ....................... Selects and displays all graph eqations.
4 Program ....................... Selects and displays all program files.
5 G_Data ......................... Selects and displays all graph data files.
6 L_Data ......................... Selects and displays all list data files.
7 Picture ......................... Selects and displays all picture data files.
8 A~Z, Ø .......................... Selects and displays all fixed memory of A to Z, and Ø
B BACKUP ...................... Menu to send all data of files. Use this
feature to send the entire content.
Select LINK/SEND.
15
System options
EL-9400 Graphing Calculator
OHP System
Use the EL-9400 OHP system with the overhead projector to make classroom presentations convenient for the whole class to see.
EL 94T (OHP system)
AC adaptor (optional)
OHP Projection Panel
CE-450L
OHP Panel
Controller
The CE-450L is included
for separate use
(see page 15)
Procedure
1
Switch off the OHP Panel Controller.
2
Plug in the cable connector of the OHP Projection Panel straight into the connection terminal of the
OHP Panel Controller.
(The optional AC adaptor is recommended for extended use of the OHP Projection Panel.)
3
Switch on the OHP Panel Controller.
4
Operating the OHP Panel Controller.
The OHP Projection Panel display is synchronized with the display of the OHP Panel Controller.
Place the OHP Projection Panel on top of the overhead projector to project images onto the screen.
5
16
Turn on the power of the overhead projector.
EL-9400 Graphing Calculator
Menu tree 1
SET UP
( 2nd F
)
SET UP
A
Rad
FloatPt
9
Rect
Decimal
Eqn
B DRG
1 Deg
2 Rad
3 Grad
F AMSWER
1 Decimal
2 Mixed
3 Improp
FORMAT
( 2nd F
FORMAT
C FSE
1 FloatPt
2 Fix
G EDITOR
1 Eqn
2 Oneline
D TAB
11
22
33
44
55
66
77
88
99
00
E COORD
1 Rect
2 Param
)
A
OFF
OFF
Connect
Sequen
C Y1
B EXPRES
1 ON
2 OFF
1 ON
2 OFF
D STYLE1
1 Connect
2 Dot
E STYLE 2
1 Sequen
2 Simul
MATH
(
MATH
)
A CALC
1 log2
x
22
3 fmin(
4 fmax(
5 d/dx(
6∫
7 dx
B NUM
1 abs(
2 round(
3 ipart
4 fpart
5 int
6 min(
7 max(
8 lcm(
9 gcd(
E ANGLE
1
2'
3"
4r
5g
F INEQ
1
2
3>
4≥
5<
6≤
C PROB
1 random
2 nPr
3 nCr
4!
D CONV
1 deg
2 dms
3 xy r(
4 xy
(
5r
x(
6r
y(
G LOGIC
1 and
2 or
3 not
4 xor
5 xnor
17
EL-9400 Graphing Calculator
Menu tree 2
When coordinate system is Rect
CALC
( 2nd F
CALC
When coordinate system is Param
)
CALC
CALC
( 2nd F
CALC
)
( 2nd F
LIST
)
CALC
1 Value
2 Intsct
3 Minimum
4 Maximum
5 X_Incpt
6 Y_Incpt
7 Inflec
1 Value
LIST
A OPE
1 sortA(
2 sortD(
3 dim(
4 fill(
5 seq(
6 cumul
7 df_list
8 aug...(
STAT
A EDIT
Press
( 2nd F
DRAW
ENTER
B OPE
1 sortA(
2 sortD(
3 SetList
4 ClrList
C CALC
1 1_Stats
2 2_Stats
D REG
01 Med Med
02 ax+b
03 a+bx
04 x2
05 In
06 log
07 abx
08 aebx
09 x-1
10 axb
11 x'
12 y'
)
A DRAW
1 ClrDraw
2 Line(
3 H_Line
4 V_Line
5 T_Line(
6 Draw
7 Shade(
8 DrawInv
9 Circle(
0 Text(
F PICT
1 StoPict
2 RclPict
18
C L_DATA
1 stoLD
2 RclLD
( STAT )
edit list
DRAW
B MATH
1 min(
2 max(
3 mean(
4 median(
5 sum(
6 prod(
7 stdDv(
8 varian(
B POINT
1 PntON(
2 PntOFF(
3 PntCHG(
4 PxlON(
5 PxlOFF(
6 PxlCHG(
7 PxlTST(
G SHADE
1 SET
2 INITIAL
C ON/OFF
1 DrawON
2 DrawOFF
D LINE
select
line type
Press
ENTER
E G_DATA
1 StoGD
2 RclGD
EL-9400 Graphing Calculator
Menu tree 3
ZOOM
( ZOOM )
A ZOOM
1 Auto
2 Box
3 In
4 Out
5 Default
6 Square
7 Dec
8 Int
9 Stat
PROGM-COM
(
2nd F
PRGM
A PRGM
F FORM
1 ExprON
2 ExprOFF
3 Y' ON
4 Y' OFF
5 Connect
6 Dot
7 Sequen
8 Simul
(
VARS
D EXP
1 10x
2 ex
3 log x
4 In x
E TRIG
1 sin x
2 cos x
3 tan x
4 sin-1 x
5 cos-1 x
6 tan-1 x
G RCL
1 StoWin
2 PreWin
on Program screen)
1 Print
2"
3 Input
4 Wait
5 Rem
6 End
VARS
1 X2
2 X-1
3 X
Press ENTER
F STO
1 StoWin
C POWER
B FACTOR
Set factor
of zoom
B BRNCH
1 Label
2 Goto
3 If
4 Gosub
5 Return
G S_PLOT
1 Plt1(
2 Plt2(
3 Plt3(
C SCRN
1 ClrT
2 ClrG
3 DispT
4 DispG
D I/O
1 Get
2 Send
E COORD
1 Rect
2 Param
H COPY
1 StoLine
2 RclLine
)
A EQVARS
Graph equation
B WINDOW
C STOWIN
Value of
window
Value of
stored window
Press ENTER
Press ENTER
Press ENTER
F PICTUR
1 Pict1
2 Pict2
3 Pict3
4 Pict4
5 Pict5
6 Pict6
7 Pict7
8 Pict8
9 Pict9
0 Pict0
G TABLE
1 TBLStrt
2 TBLStep
3 TBLList
H STAT
stat
Press ENTER
D L_DATA
1 L_Data 1
2 L_Data 2
3 L_Data 3
4 L_Data 4
5 L_Data 5
6 L_Data 6
7 L_Data 7
8 L_Data 8
9 L_Data 9
0 L_Data 0
E G_DATA
1 G_Data 1
2 G_Data 2
3 G_Data 3
4 G_Data 4
5 G_Data 5
6 G_Data 6
7 G_Data 7
8 G_Data 8
9 G_Data 9
0 G_Data 0
19
EL-9400 Graphing Calculator
Menu tree 4
EQ VAR
( VARS
A
)
A XY
1
2
3
4
5
6
7
8
9
0
B XYT
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9
Y0
01
02
03
04
05
06
WIN VAR
( VARS
B
BT
Xmin
Xmax
Xscl
Ymin
Ymax
Yscl
X_Fact
Y_Fact
ZOOM VAR
1 Tmin
2 Tmax
3 Tstep
( VARS
C
)
A STOXY
1
2
3
4
5
6
B STOT
Zm_Xmin
Zm_Xmax
Zm_Xscl
Zm_Ymin
Zm_Ymax
Zm_Yscl
STAT VAR
X4T
Y4T
X5T
Y5T
X6T
Y6T
)
A XY
1
2
3
4
5
6
7
8
07
08
09
10
11
12
X1T
Y1T
X2T
Y2T
X3T
Y3T
1 Zm_Tmin
2 Zm_Tmax
3 Zm_Tstp
( VARS
H
)
A XY
01
02
03
04
05
06
07
08
n
x
sx
x
xmin
xmax
∑x
∑x2
PRGM
B REGEQN
09
10
11
12
13
14
15
16
∑xy
y
sy
y
ymin
ymax
∑y
∑y2
20
RegEqn
a
b
c
r
r2
R2
resid
( PRGM )
A EXEC
01
02
03
04
05
06
1
2
3
4
5
6
7
8
B EDIT
01
02
03
04
05
06
C NEW
Cleate
new program
Press ENTER
C POINTS
1
2
3
4
5
6
7
8
9
x1
x2
x3
y1
y2
y3
Q1
Med
Q3
EL-9400 Graphing Calculator
Menu tree 5
STAT PLOT
( 2nd F
STATPLOT )
A PLOT1
B PLOT2
C PLOT3
Stat plot1
Stat plot2
Stat plot3
Press ENTER
Press ENTER
Press ENTER
OPTION
( 2nd F
OPTION
A CTRST
B MEMCHK
Press ENTER
(
C DEL
1 List
2 GraphEq
3 Program
4 Picture
5 G-Data
6 L-Data
7 Entry
D LINK
1 SEND
2 RECEIVE
E RESET
1 default
2 All mem
2nd F STATPLOT on PLOT1-3screen )
A HIST
SLIDE
E ON/OFF
1 PlotON
2 PlotOFF
)
Remain
12345bytes
STAT GRAPH
D LIMIT
1 SET
2 LimON
3 LimOFF
B B.L.
C N.P.
1 Hist
1 Broken •
2 Broken+
3 Broken
1 Norm • X
2 Norm+_X
3 Norm _X
4 Norm • _Y
5 Norm+_Y
6 Norm _Y
F MBOX
1 MBox •
2 MBox+
3 MBox
G S.D.
1 Scattr •
2 Scattr+
3 Scattr
H XYLINE
1 xyLine •
2 xyLine+
3 xyLine
(
SLIDESHOW
(
2nd F SHIFT/CHANGE
D N.D.
1 NormDis
E BOX
1 Box
)
A B-IN
1Y
2Y
3Y
4Y
5Y
6Y
7Y
8Y
2
X
AX+B
X
1/X
sinX
tanX
cos-1X
lnX
SHIFT/CHANGE
A SHIFT
1Y
2Y
3Y
4Y
5Y
6Y
7Y
8Y
2
X
X
1/X
ex
lnX
sinX
tanX
X
)
B CHANGE
1Y
2Y
3Y
4Y
5Y
6Y
2
X
X
X
ex
sinX
tanX
21
EL-9400 Graphing Calculator
Menu tree 6
Y=
(
Y=
)
RECT MODE
PAR MODE
Y1=
Y2=
Y3=
Y4=
Y5=
Y6=
Y7=
Y8=
Y9=
Y0=
X1T=
Y1T=
X2T=
Y2T=
X3T=
Y3T=
X4T=
Y4T=
X5T=
Y5T=
X6T=
Y6T=
LINK
(
2nd F
OPTION
A SELECT
1 All
2 List
3 GraphEq
4 Program
22
D
1)
B BACKUP
5 G_Data
6 L_Data
7 Picture
8 A Z,
back up
Press ENTER
Specifications
EL-9400 Graphing Calculator
Specifications
Dimensions W x D x H (mm)
163 x 76 x 19.5 (without hardcase)
Power
AAA x 4
Backup Battery
CR2032 x 1
Display
Size (dot)
96 x 64
Line x Characters
8 x 16
Character Size (dot)
5x7
Digits (mantissa + exponent)
10 + 2
Total Memory Size
32 KB
Constant Memory
27 + last answer memory
Memory
Accessory Protective hard case
Standard
Features
Graphing
Function graphing
Up to 10
Parametric graphing Up to 6
Zoom, Trace
Table of function values
Statistics
Regression models
10
Scatter Plots and Histograms
Box-and-Whisker Diagrams
Other
List
Up to 6 (Maximum length : 999)
Programming
Trigonometry functions (including sec, csc, cot)
Fraction/Decimal conversions
Last entry recall
Last answer recall
Features
unique to
Sharp
Equation editor, Shift/Change, Slide show (Built-in), Rapid graph,
Rapid window, Rapid zoom, List grouping
Peripheral CE-450L
Unit-to-unit communications cable
CE-LK1
PC-Link (Print screen/Data storage)
EL-94T
OHP system (includes controller)
* Design and specifications are subject to change without notice.
* Some products may not be available in some countries.
23
EL-9400 Graphing Calculator
Rectangular coordinate graphs
Example
Use rectangular coordinate to enter two graph equations
and shade the area surrounded by the graphs
Before carrying out the following operation, press the reset switch located on the back of the unit and press
keys (caution: previously entered equations and memory will be erased).
Display
SET UP
1
2
Y=
1
7
X/T
Notes
Specify Rect mode on the screen.
]
Key Operation
As shown, Rect corresponds to
. The example
shows the initial settings of the
EL-9400.
]
Enter graph equation
“7sinX+X” at Y1.
X/T
3
X/T
Enter graph equation
“X+1” at Y2.
1
Display the graph.
4
5
6
1
Specify the area surrounded by the two
graph equations to be shaded. (Y2<Y<Y1
on screen shows area to be shaded as
larger than Y2 and smaller than Y1).
Return to the graph display and the specified
area will be shaded.
EL-9400 Graphing Calculator
CALC function
Example
Use the CALC function to solve graph equations
(The coordinate axis is rectangular coordinates.)
Before carrying out the following operation, press the reset switch located on the back of the unit and press
keys (caution: previously entered equations and memory will be erased).
Display
Key Operation
0
Y=
x
5
X/T
2
7
1
Display the graph.
1
4
Specify the value of X to find the value
of Y, by specifying the value of CALC.
Enter “3” as the value of X and the
value of Y is calculated.
3
]
2
2
The values X and Y appear at the bottom of the
screen and the cursor appears at the
corresponding point on the graph.
]
Specify “Intsct” function to calculate the
intersection point of the two graphs.
]
7
Enter the graph equation
“4 X+7-10 ” at Y2.
0
3
6
Enter the graph equation
“0.5X2-5” at Y1.
5
2
5
X/T
After completion of the calculation, the values of
the X,Y intersection will appear at the bottom of
the screen, and the cursor will appear at the
corresponding point on the graph, as before.
]
The graph is intersected at two points.
Carry out the same operation as in
to find the second intersection.
]
1
Notes
After completion of the calculation, the values of
the X,Y intersection will appear at the bottom of
the screen, and the cursor will appear at the
corresponding point on the graph, as before.
]
EL-9400 Graphing Calculator
Statistics calculations
Example
10 students achieved the following results in a mathematics examination. Draw a
graph to classify these results into top, bottom and average score.
Exam results: 68, 73, 92, 86, 78, 95, 69, 75, 82, 81
Before carrying out the following operation, press the reset switch located on the back of the unit and press
keys (caution: previously entered equations and memory will be erased).
Display
Key Operation
Specify two figures after the decimal
point on the set up screen.
SET UP
1
2
2
6
2
7
6
6
Notes
3
2
7
7
Enter all the exam results into the
list L1.
5
5
2
1
3
1
Select the variable quantity of the
statistics from the statistics mode.
4
Specify the list L1 containing the
exam data.
5
Calculates the quantity of the
statistics such as average, standard
deviation, total and bottom score.
6
Set the screen for the various
specified values in order to draw
the statistical graph with PLOT1.
7
Input of the specified values for drawing
a histogram from the list L1 of the
statistical quantity has been completed.
]
8
on/off: set whether to graph or not
DATA: select variable 1(X) or variable 2 (XY).
List X: set the list of the corresponding graph.
Freq: set frequency
GRAPH: set graph format
]
Draw the graph by setting the most
suitable screen for the statistical
graph.
EL-9400 Graphing Calculator
Distributed by:
SHARP CORPORATION OSAKA, JAPAN
FAX: 06-628-1653
FD0094N@ SHARP CORP.(FEB‘98PROD.) H0.5E Printed in Hong Kong