Texas Instruments TI-89 Titanium User Manual page 310

Tracing a Function
To display the exact coordinates of any plotted point on a graphed function, use the ...
tool. Unlike the free-moving cursor, the trace cursor moves only along a function's
Trace
plotted points.
Beginning a Trace
From the Graph screen, press ....
The trace cursor appears on the function, at the middle x value on the screen. The
cursor's coordinates are displayed at the bottom of the screen.
If multiple functions are graphed, the trace cursor appears on the lowest-numbered
function selected in the Y= Editor. The function number is shown in the upper right part
of the screen.
If any stat plots are graphed, the trace cursor appears on the lowest-numbered stat plot.
Moving along a Function
To move the trace cursor:
To the previous or next plotted point
Approximately 5 plotted points
(it may be more or less than 5,
depending on the xres Window variable)
Basic Function Graphing
Do this:
A B
Press or .
2 A 2 B
Press or .
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