Texas Instruments TI-83 PLUS - Manual (Page 558)

TI-83 Plus Activities 555
7. Press Í .
The trace cursor jumps to the point on the Y 1
function evaluated at X=3.8 .
8. Press | and ~ until you are on the maximum
Y value.
This is the maximum of Y 1 (X) for the X pixel
values. The actual, precise maximum may lie
between pixel values.
Box with Lid
Zooming In on the Graph
To help identify maximums, minimums, roots, and intersections of
functions, you can magnify the viewing window at a specific location
using the
ZOOM
instructions.