User Guide

Chapter 3: Function Graphing 74

1. Enter the value you want to store.

2. Press ¿.

3. Press  to display the VARS menu.

4. Select 1:Window to display the Func window variables (X/Y secondary menu).

• Press ~ to display the Par and Pol window variables (T/q secondary menu).

• Press ~ ~ to display the Seq window variables (U/V/W secondary menu).

5. Select the window variable to which you want to store a value. The name of the variable is

pasted to the current cursor location.

6. Press Í to complete the instruction.

When the instruction is executed, the TI-84 Plus stores the value to the window variable and

displays the value.

@X and @Y

ΔX

Xmax Xmin–()

---------------------------------------=

The variables @X and @Y (items 8 and 9 on the VARS (1:Window) X/Y secondary menu; @X is also

on the Window screen) define the distance from the center of one pixel to the center of any

adjacent pixel on a graph (graphing accuracy). @

X and @Y are calculated from Xmin, Xmax, Ymin,

and

Ymax when you display a graph.

ΔY

Ymax Ymin–()

---------------------------------------=

You can store values to @X and @Y. If you do, Xmax and Ymax are calculated from @X, Xmin, @Y,

and

Ymin.

Note: The ZFrac ZOOM settings (Zfrac1/2, ZFrac1/3, ZFrac1/4, ZFrac1/5, ZFrac1/8, ZFrac1/10)

change @

X and @Y to fractional values. If fractions are not needed for your problem, you can adjust

X and @Y to suit your needs.

Setting the Graph Format

Displaying the Format Settings

To display the format settings, press y .. The default settings are highlighted below.

Note: You can also go to the Format Graph screen from the Mode screen by selecting YES at the

GoTo Format Graph prompt. After you make changes, press z to return to the Mode screen.

RectGC PolarGC

Sets cursor coordinates.

CoordOn CoordOff

Sets coordinates display on or off.

GridOff GridOn

Sets grid off or on.