The minimum option is used to find a relative minimum. While viewing a graph, press
(The minimum option can also be obtained by using the
to select option 3 and pressing
Since a function may have more than one relative minimum, specify an interval
containing the desired low point on the graph.
The question "Lower Bound?" appears at the bottom of the screen.
Use the to move the blinking cursor
to the left of the relative minimum. 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 minimum. Press
The coordinates of the minimum appear at the bottom of the screen. In this case,
the minimum point is approximately (-7.85,-1).
Note: The minimum option finds the minimum within a specified interval
within 0.00001 even if the graph never reaches a turning point.