Texas Instruments TI-83 PLUS - Manual (Page 210)

TI-83 Plus Tables 207
Defining the Dependent Variables
Defining Dependent Variables from the Y= Editor
In the Y= editor, enter the functions that define the dependent variables.
Only functions that are selected in the Y= editor are displayed in the
table. The current graphing mode is used. In Par mode, you must define
both components of each parametric equation (Chapter 4).
Editing Dependent Variables from the Table Editor
To edit a selected Y= function from the table editor, follow these steps.
1. Press y 0 to display the table, then press ~ or | to move the
cursor to a dependent-variable column.
2. Press } until the cursor is on the function name at the top of the
column. The function is displayed on the bottom line.