3. Graph Function Operations. Casio fx-7400GPLUS

Chapter 4 Graphing

3. Graph Function Operations

You can store up to 10 functions in memory. Functions in memory can be edited, recalled, and graphed. The types of functions that can be stored in memory are: rectangular coordinate functions, parametric functions, and inequalities.

Specifying the Graph Type

Before you can store a graph function in memory, you must first specify its graph type.

1. While the Graph Function Menu is on the display, press [ to display a Graph

Type Menu.

[

1 (Y =) ......... Rectangular coordinate graph

2 (Parm) ...... Parametric graph

[

1 2 3 4 [

1 (Y >) ......... Y > f ( x ) inequality

2 (Y <) ......... Y < f ( x ) inequality

3 (Y

≥

) ......... Y > f ( x ) inequality

4 (

≤

) ......... Y < f ( x ) inequality

Press [ to return to the previous menu

1 2 3 4 [

2. Press the function key that corresponds to the graph type you want to specify.

Storing Graph Functions

To store a rectangular coordinate function (Y =)

Example To store the following expression in memory area Y1: y = 2 x 2 – 5

[ 1 (Y =)

(Specifies rectangular coordinate expression.) c T x -f

(Inputs expression.) w

(Stores expression.)

Graphing Chapter 4

• You will not be able to store the expression in an area that already contains a parametric function. Select another area to store your expression or delete the existing parametric function first. This also applies when storing inequalities.

To store a parametric function

Example To store the following functions in memory areas Xt2 and Yt2: x = 3 sin T y = 3 cos T

[ 2 (Parm)

(Specifies parametric expression.) d s T w

(Inputs and stores x expression.) d c T w

(Inputs and stores y expression.)

• You will not be able to store the expression in an area that already contains a rectangular coordinate expression or inequality. Select another area to store your expression or delete the existing expression first.