Texas Instruments TI-89 Manual Book page 71

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