Defining Functions - Texas Instruments TI-82 STATS Manual Book

Defining Functions

Displaying
Functions in the
Y= Editor
Defining or
Editing a
Function
editor, press o. You can store up to 10
To display the
Y=
functions to the function variables
can graph one or more defined functions at once. In this
example, functions
To define or edit a function, follow these steps.
1. Press o to display the
2. Press † to move the cursor to the function you want to
define or edit. To erase a function, press '.
3. Enter or edit the expression to define the function.
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
defines „ as
ƒ [
].
X
When you enter the first character, the
indicating that the function is selected.
As you enter the expression, it is stored to the variable
a user-defined function in the
4. Press Í or † to move the cursor to the next function.
through
Y
1
and are defined and selected.
Y Y
1 2
editor.
Y=
, press „ or press
. To enter
X X
editor.
Y=
, and . You
Y Y
9 0
.
X Func
is highlighted,
=
Function Graphing 3.5
mode
as
Yn