## Maximum Option

The maximum option is used to find a relative maximum. While viewing a graph, press
.

Press .
(The maximum option can also be obtained by using the
to select option 4 and pressing
.)
Since a function may have more than one relative maximum, specify an interval
containing the desired low point on the graph. (The "3" in the upper right-hand
corner indicates finding a relative maximum on the graph of the third function.)

The question "Lower Bound?" appears at the bottom of the screen.
Use the to move the blinking cursor
to the *left* of the relative maximum. Press .

The question "Upper Bound?" appears at the bottom of the screen. Use the
to move the blinking
cursor to the right of the relative maximum.
Press .

The coordinates of the maximum appear at the bottom of the screen. In this
case the maximum point is about (-4.7,1).

**Note:** The maximum option finds the maximum within a specified interval
within 0.00001 even if the graph never reaches a turning point.