Texas Instruments TI-89 Manuel D’Utilisation

Parametric Graphing

 349

•

Use  the 

„

toolbar menu to zoom in or out on a portion of the graph.

•

Use  the 

‡

 toolbar menu to find derivatives, tangents, etc. Some menu items 

are not available for parametric graphs.

Differences in Parametric and Function Graphing

Differences in Parametric and Function Graphing

Differences in Parametric and Function Graphing

Differences in Parametric and Function Graphing

This module assumes that you already know how to graph 

 functions as described in 

Basic Function Graphing. This section describes the differences that apply to parametric 
equations.

Setting the Graph Mode

Setting the Graph Mode

Setting the Graph Mode

Setting the Graph Mode

Use 

3 to set 

 before you define equations or set Window 

variables. The Y= Editor and the Window Editor let you enter information for the 

 

 mode setting only.

Defining Parametric Equations on the Y= Editor

Defining Parametric Equations on the Y= Editor

Defining Parametric Equations on the Y= Editor

Defining Parametric Equations on the Y= Editor

To graph a parametric equation, you must define both its x and y components. If you 
define only one component, the equation cannot be graphed. (However, you can use 
single components to generate an automatic table as described in Tables.)

Enter x and y components on 
separate lines.

You can define xt1(t) through 
xt99(t) and yt1(t) through yt99(t).