Texas Instruments TI-84 Plus Guide Book

Chapter 3: Function Graphing 97
Defining or Editing a Function
Defining or Editing a FunctionDefining or Editing a Function
Defining or Editing a Function
To define or edit a function, follow these steps.
1. Press o to display the Y= editor.
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 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
Yn as a user-defined function
in the Y= editor.
4. Press Í or † to move the cursor to the next function.

Texas Instruments TI-84 Plus Specifications

General

Battery type	AAA
Power source	Battery
Number of batteries supported	4
Type	Graphing
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black
USB port	Yes
USB 2.0 ports quantity	1
Digits	- digits
Display number of lines	8 lines
Display number of characters	16
RAM capacity	0.024 MB
ROM capacity	0.480 MB
Storage media type	-