Texas Instruments PLUS TI-89 - Manual (Page 71)

54 Chapter 2: Operating the Calculator
02OPER.DOC TI-89/TI-92 Plus: Operating the TI-89/TI-92 Plus (English) Susan Gullord Revised: 02/23/01 1:06 PM Printed: 02/23/01 2:11 PM Page 54 of 44
Indicator Meaning
Exact/
Approx
Mode Shows how answers are calculated and displayed.
Refer to page 29. To change the
Exact/Approx mode,
use the 3 key.
AUTO Auto
EXACT Exact
APPROX Approximate
Graph
Number If the screen is split to show two independent graphs,
this indicates which graph is active —
GR1 or GR2 .
(Displays G#1 or G#2 on the TI -92 Plus .)
Graph
Mode Indicates the type of graphs that can be plotted. To
change the
Graph mode, use the 3 key.
FUNC y(x) functions
PAR x(t) and y(t) parametric equations
POL r( q ) polar equations
SEQ u(n) sequences
3D z(x,y) 3D equations
DE y'(t) differential equations
Battery Displayed only when the batteries are getting low. If
BATT is shown with a black background, change the
batteries as soon as possible.
History Pairs,
Busy/Pause,
Archived The information shown in this part of the status line
depends on the application you are using.
23/30 Displayed on the Home screen to show the number
of entry/answer pairs in the history area. Refer to
page 24.
BUSY A calculation or graph is in progress.
PAUSE You paused a graph or program.
Œ
The variable opened in the current editor
(Data/Matrix Editor, Program Editor, or Text Editor)
is locked or archived and cannot be modified.
Status Line
(continued)