Texas Instruments TI-89 User Manual

Previews

Basic Function Graphing III

Use the “Detect Discontinuities” graph format to eliminate faux asymptotes and
connections in a jump discontinuity.

Steps and keystrokes

Display

1. Display the

MODE

dialog box. For

Graph

mode, select

FUNCTION

. For

Angle

mode,

select

RADIAN

Press

3 B 1 D D D B 1 ¸

2. Open the Y= Editor and enter y1(x)=1/(x-

1).

Press

8 # 1 e c X | 1 d ¸

3. Display the Graph Formats dialog box

and set “Detect Discontinuities” to OFF

Note:

The second item on the Graph

Format dialog is not greyed out, which
means it can be set to sequential “Seq” or
simultaneous “Simul”.

Press

8 Í D D D D D D B 1 ¸q