Overview Of Steps In Graphing Parametric Equations; Exploring The Graph - Texas Instruments TI-89 Manual Book

Overview of Steps in Graphing Parametric Equations

Graphing
Parametric
Equations
Tip: To turn off any stat
data plots (Chapter 16),
press ‡ 5 or use † to
deselect them.
Tip: This is optional. For
multiple equations, this helps
visually distinguish one from
another.
Tip: „ Zoom also changes
the viewing window.

Exploring the Graph

To graph parametric equations, use the same general steps
used for y(x) functions as described in Chapter 6: Basic
Function Graphing. Any differences that apply to parametric
equations are described on the following pages.
Set Graph mode (3)
to .
PARAMETRIC
Also set Angle mode,
if necessary.
Define x and y
components on
Y= Editor (¥ #).
Select (†) which
defined equations to
graph. Select the x or y
component, or both.
Set the display style
for an equation.
You can set either the
x or y component.
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
equations (¥ %).
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 parametric equation.
¦
Use the „
toolbar menu to zoom in or out on a portion of
Zoom
the graph.
¦
Use the ‡
toolbar menu to find derivatives, tangents, etc.
Math
Some menu items are not available for parametric graphs.
Chapter 7: Parametric Graphing 129