Texas Instruments TI-89, TI-92

212 Chapter 12: Additional Graphing Topics

12ADDLGR.DOC TI-89/TI-92 Plus: Additional Graphing Tools (English) Susan Gullord Revised: 02/23/01 1:03 PM Printed: 02/23/01 2:15 PM Page 212 of 20

Execute DrawFunc, DrawParm, or DrawPol from the Home screen or

a program. You cannot draw a function or equation interactively

from the Graph screen.

DrawFunc expression

DrawParm expression1

expression2

[,tmin] [,tmax] [,tstep]

DrawPol expression

min] [,

max] [,

step]

For example:

1. Define y1(x)=.1xòì2x+6 on the

Y= Editor, and graph the

function.

2. On the Graph screen, press:

TI-89: 2 ˆ

TI-92 Plus: ˆ

and select 2:DrawFunc.

3. On the Home screen, specify

the function to draw. DrawFunc y1(x)ì6

4. Press ¸ to draw the

function on the Graph

screen.

You cannot trace, zoom, or

perform a math operation on

a drawn function.

Execute DrawInv from the Home screen or a program. You cannot

draw an inverse function interactively from the Graph screen.

DrawInv expression

For example, use the graph of y1(x)=.1xòì2x+6 as shown above.

1. On the Graph screen, press:

TI-89: 2 ˆ

TI-92 Plus: ˆ

and select 3:DrawInv.

2. On the Home screen, specify

the inverse function. DrawInv y1(x)

3. Press ¸.

The inverse is plotted as

(y,x) instead of (x,y).

Drawing a Function or Inverse on a Graph

For comparison purposes, you may want to draw a function

over your current graph. Typically, the drawn function is some

variation of the graph. You can also draw the inverse of a

function. (These operations are not available for 3D graphs.)

Drawing a Function,

Parametric, or Polar

Equation

To display the Home screen

and put

DrawFunc

in the

entry line, press:

TI-89

2 ˆ 2

TI-92 Plus

: ˆ 2

Tip: To clear the drawn

function, press

†

— or —

TI-89:

2 ˆ

and select

1:ClrDraw

TI-92 Plus:

and select

1:ClrDraw

Drawing the Inverse

of a Function