Texas Instruments TI-83 - page 561

TI-83 Plus Activities 558
2. Press | to trace along the curve to a point to
the left of the maximum, and then press Í.
A 4 at the top of the screen indicates the
selected bound.
A Right Bound? prompt is displayed.
3. Press ~ to trace along the curve to a point to
the right of the maximum, and then press
Í.
A 3 at the top of the screen indicates the
selected bound.
A Guess? prompt is displayed.
4. Press | to trace to a point near the maximum,
and then press Í.