Texas Instruments TITANIUM TI-89 - Manual (Page 768)

Activities 768
6. In the Y=Editor , press:
8 Í
and set the Graph Format variables to:
Axes= ON
Labels= ON
Style=
HIDDEN SURFACE
Note: Calculating and drawing the graph
takes about three minutes.
7. Graph the modulus surface.
The 3D graph is used to visually display a
picture of the roots where the surface
touches the
xy plane.
8. Use the Trace tool to explore the function
values at x=1 and y=0 .
9. Use the Trace tool to explore the function
values at x=0 and y=1 .