Texas Instruments TI-83 PLUS - Manual (Page 115)

TI-83 Plus Function Graphing 112
•
You may use functions and variables (including matrices and lists)
in the expression. When the expression evaluates to a nonreal
number, the value is not plotted; no error is returned.
•
The independent variable in the function is X . Func mode defines
„ as X . To enter X , press „ or press ƒ [
X
].
•
When you enter the first character, the = is highlighted, indicating
that the function is selected.
As you enter the expression, it is stored to the variable Y n
as a user-
defined function in the Y= editor.
4. Press Í or † to move the cursor to the next function.
Defining a Function from the Home Screen or a Program
To define a function from the home screen or a program, begin on a
blank line and follow these steps.
1. Press ƒ [
ã
], enter the expression, and then press ƒ [
ã
]
again.
2. Press ¿ .
3. Press  ~
1 to select 1:Function from the
VARS Y . VARS
menu.