Texas Instruments TI-83 PLUS - Manual (Page 117)

TI-83 Plus Function Graphing 114
Selecting and Deselecting Functions
Selecting and Deselecting a Function
You can select and deselect (turn on and turn off) a function in the Y=
editor. A function is selected when the = sign is highlighted. The
TI-83 Plus graphs only the selected functions. You can select any or all
functions Y 1
through Y 9
, and Y 0
.
To select or deselect a function in the Y= editor, follow these steps.
1. Press o to display the Y= editor.
2. Move the cursor to the function you want to select or deselect.
3. Press | to place the cursor on the function’s = sign.
4. Press Í to change the selection status.
When you enter or edit a function, it is selected automatically. When you
clear a function, it is deselected.