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P.33
Graphing with the Sketch Function
10 - 2 uuuuu
To graph an inverse function in the RUN or PRGM Mode
The following is the syntax for graphing an inverse function in these modes.
Inverse <graph function>
• Use the variable data (VARS) menu to specify the function to be graphed.
• You can only graph the inverse of functions whose graph type is specified as rectangular coordinate type.
k Plotting Points
When plotting points on a graph, first display the sketch menu and then press 6
( g
) 1 (PLOT) to display the plot menu.
6 ( g
) 1 (PLOT)
1 2 3 4 5 6
1 (Plot) ........ Plot a point
2 (Pl•On) ..... Plot point at specific coordinates
3 (Pl•Off) ..... Delete point at specific coordinates
4 (Pl•Chg) ... Switch status of point at specific coordinates uuuuu
To plot points in the STAT, GRAPH, TABLE, RECUR and CONICS
Modes
Example To plot a point on the graph of y = x ( x + 2)( x – 2)
1. After graphing the function, display the sketch menu and perform the following operation to cause the pointer to appear on the graph screen.
!4
(Sketch) 6 ( g
) 1 (PLOT) 1 (Plot)
2. Use the cursor keys ( f , c , d , e ) to move the pointer the locations of the points you want to plot and press w to plot.
• You can plot as many points as you want.
e
~ ef
~ f w
• The current x - and y -coordinate values are assigned respectively to variables X and Y.
179
10 - 2
Graphing with the Sketch Function uuuuu
To plot points in the RUN or PRGM Mode
The following is the syntax for plotting points in these modes.
Plot < x -coordinate>, < y -coordinate>
Example To plot a point at (2, 2)
Use the following View Window parameters.
Xmin = –5 Ymin = –10
Xmax = 5
Xscale = 1
Ymax = 10
Yscale = 2
1. After entering the RUN Mode, display the sketch menu and perform the following operation.
!4
(Sketch) 6 ( g
)
1 (PLOT) 1 (Plot) c,c
1 2 3 4 5 6
2. Press w and the pointer appears on the display. Press w again to plot a point.
ww
• You can use the cursor keys ( f
, c
, d
, e
) to move the pointer around the screen.
• If you do not specify coordinates, the pointer is located in the center of the graph screen when it appears on the display.
• If the coordinates you specify are outside the range of the View Window parameters, the pointer will not be on the graph screen when it appears on the display.
• The current x - and y -coordinate values are assigned respectively to variables X and Y.
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