Texas Instruments TITANIUM TI-89 User Manual page 322

To move the trace cursor:
To a specified x value on the function
If you enter an x value, it must be between
Note:
The trace cursor moves only from plotted point to plotted point along the function, not
from pixel to pixel.
If your screen does not show coordinates, set the graph format so that
or . Press:
RECT POLAR
8 Í
Each displayed y value is calculated from the x value; that is,
undefined at an x value, the y value is blank.
You can continue to trace a function that goes above or below the viewing window. You
cannot see the cursor as it moves in that "off the screen" area, but the displayed
coordinate values show its correct coordinates.
Use QuickCenter to trace a function that goes above or below the window.
Note:
Basic Function Graphing
Do this:
Type the x value and
¸
press .
xmin
Function number being traced.
For example: y3(x).
Trace coordinates are
those of the function, not
the pixel.
and .
xmax
Coordinates =
. If the function is
y=yn(x)
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