Texas Instruments TI-83 PLUS - Manual (Page 116)

TI-83 Plus Function Graphing 113
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 " ! Y n
When the instruction is executed, the TI-83 Plus stores the expression to
the designated variable Y n , selects the function, and displays the
message Done .
Evaluating Y= Functions in Expressions
You can calculate the value of a Y= function Y n at a specified value of X . A
list of values returns a list.
Y n ( value )
Y n ({ value1,value2,value3, . . .,value n })