Texas Instruments TI-84 - Manual (Page 101)

Chapter 3: Function Graphing 98
Defining a Function from the Home Screen or a Program Defining a Function from the Home Screen or a Program Defining a Function from the Home Screen or a Program 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.
4. Select the function name, which pastes the name to the cursor location on the home
screen or program editor.
5. Press
Í to complete the instruction.
"expression"
!
Yn
When the instruction is executed, the TI-84 Plus stores the expression to the designated
variable
Yn , selects the function, and displays the message Done .
Evaluating Y= Functions in Expressions Evaluating Y= Functions in Expressions Evaluating Y= Functions in Expressions Evaluating Y= Functions in Expressions
You can calculate the value of a Y= function Yn at a specified value of X. A list of values
returns a list.