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Editing functions, Selecting functions – Texas Instruments TI-73 EXPLORER User Manual

Page 174

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168

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

Editing Functions

Editing Functions

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.

Selecting Functions

Selecting Functions

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

Plot1

,

Plot2

, or

Plot3

, 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.

Y

2

is selected.

Y

2

is deselected.