Texas Instruments TITANIUM TI-89 User Manual

Page 322

Basic Function Graphing

322

Note:

If you enter an x value, it must be between

xmin

and

xmax

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

Coordinates =

RECT

POLAR

. Press:

8 Í

Each displayed y value is calculated from the x value; that is,

y=yn(x)

. If the function 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.

Note:

Use QuickCenter

to trace a function that goes above or below the window.

To a specified x value on the function

Type the x value and
press

To move the trace cursor:

Do this:

Trace coordinates are
those of the function, not
the pixel.

Function number being traced.
For example: y3(x).