Texas Instruments TI-73 用户手册

     Chapter 9: Function Graphing

7309ENG.DOC   CH 9 Function Graphing, English   Julie Hewlett   Revised: 07/29/98 12:14 PM   Printed: 05/19/99

9:01 AM   Page 168 of 24

 

You can edit or delete functions at any time in the Y= editor.

Move the cursor to the function in the Y= editor that you want

to change.
You can:

• 

Use the edit keys such as / and - m to delete and

insert characters.

• 

Overwrite current entries.

• 

Delete a function with :. Position the cursor

anywhere on the function.

 

Even if a function is defined in the Y= editor, the TIN73 only

graphs the function if it is selected (turned on). You know that

a function is selected because the background behind a

function’s equal sign (

) is dark.

When you first define a function, it is selected automatically.
To select or deselect a function,

highlight its 

 using the cursor

keys, and then press b.

You can change the on/off status of a statistical plot in the

Y= editor. To select or deselect 

, 

, or 

, highlight

the name (across the top of the Y= editor) using the cursor

keys, and then press b. A plot is selected (on) if the

background behind its name is dark.

 is selected.

 is deselected.