Texas Instruments TITANIUM TI-89 - Manual (Page 319)

Basic Function Graphing 319
• Changed a stat plot definition.
Displaying Coordinates with the Free-Moving Cursor Displaying Coordinates with the Free-Moving Cursor Displaying Coordinates with the Free-Moving Cursor Displaying Coordinates with the Free-Moving Cursor
To display the coordinates of any location on the Graph screen, use the free-moving
cursor. You can move the cursor to any pixel on the screen; the cursor is not confined to
a graphed function.
Free-Moving Cursor Free-Moving Cursor Free-Moving Cursor Free-Moving Cursor
When you first display the Graph screen, no cursor is visible. To display the cursor, press
a cursor pad arrow. The cursor moves from the center of the screen, and its coordinates
are displayed.
If your screen does not show coordinates, set the graph format so that Coordinates =
RECT or POLAR . Press:
8 Í
To move the free-moving cursor: Press:
To an adjoining pixel A cursor pad arrow for any direction.
y1(x)=x
2
The “c” indicates these are cursor coordinates.
The values are stored in the xc and yc system
variables. Rectangular coordinates use xc and
yc. Polar coordinates use rc and
q c.