Texas Instruments TITANIUM TI-89 - Manual (Page 307)

Basic Function Graphing 307
The function list now shows the new function, which is automatically selected for
graphing.
Note: If you accidentally move the cursor to the entry line, press N to move it back to
the function list.
Editing a Function Editing a Function Editing a Function Editing a Function
From the Y= Editor:
1. Press D and C to highlight the function.
2. Press ¸ or … to move the cursor to the entry line.
3. Do any of the following:
• Use B and A to move the cursor within the expression and edit it. Refer to
“Editing an Expression in the Entry Line” in Operating the Calculator.
– or –
• Press M once or twice to clear the old expression, and then type the new
one.
4. Press ¸.
The function list now shows the edited function, which is automatically selected for
graphing.
Note: To cancel any editing changes, press N instead of ¸.