Texas Instruments PLUS TI-89 - Manual (Page 124)

Chapter 6: Basic Function Graphing 107
06BASFUN.DOC TI-89/TI-92 Plus: Basic Function Graphing (English) Susan Gullord Revised: 02/23/01 4:09 PM Printed: 02/23/01 4:18 PM Page 107 of 22
From the Graph screen, you can:
¦ Display the coordinates of any pixel by using the free-moving
cursor, or of a plotted point by tracing a function.
¦ Use the „ Zoom toolbar menu to zoom in or out on a portion of
the graph.
¦ Use the ‡ Math toolbar menu to find a zero, minimum,
maximum, etc.
Overview of Steps in Graphing Functions
To graph one or more y(x) functions, use the general steps
shown below. For a detailed description of each step, refer to
the following pages. You may not need to do all the steps each
time you graph a function.
Graphing Functions
Exploring the Graph
Tip: This is optional. For
multiple functions, this helps
visually distinguish one from
another.
Tip: „ Zoom also changes
the viewing window.
Set Graph mode ( 3 )
to FUNCTION .
Also set Angle mode,
if necessary.
Define functions on
Y= Editor ( ¥ # ).
Select ( † ) which
defined functions to
graph.
Set the display style for
a function.
TI . 89: 2 ˆ
TI . 92 Plus: ˆ
Define the viewing
window ( ¥ $ ).
Change the graph
format, if necessary.
ƒ 9
— or —
TI . 89: ¥ Í
TI . 92 Plus: ¥ F
Graph the selected
functions ( ¥ % ).
Tip: To turn off any stat
data plots (Chapter 16),
press
‡ 5 or use † to
deselect them.