Minimum Option

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



Press to obtain the minimum option.



(The "1" in the upper right-hand corner indicates finding a relative minimum on the graph of function one.)

Press .



The coordinates of the minimum appear at the bottom of the screen. In this case the minimum point is about (2.018,-1.207).

Note: Since a function may have more than one relative minimum, you may need to specify an interval containing the desired low point on the graph.



To set the lower bound press and move the cursor to the left of the relative minimum and press .

To set the upper bound press and move the cursor to the right of the relative minimum and press .

There should be two small triangles at the top pointing towards each other. These settings can be adjusted by reselecting lower or upper and will go away when you change your window. The TI-85 will look for the relative minimum between these markers.