Chapter 3: Function Graphing 98
Defining a Function from the Home Screen or a Program
Defining a Function from the Home Screen or a ProgramDefining 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 VARSY-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 ExpressionsEvaluating 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.