From the graph screen, select F5 Math . The TI-92 calculator allows you to select a number of different math options. A few are listed below. Minimum and Maximum find a minimum and maximum point within an interval. Intersection finds the intersection of two functions.
Inflection finds the inflection point of a curve.
Tangent draws a tangent line at a point and displays its equation. Let's start by looking at the intersection of these two functions. Next, move the cursor to the Lower Bound x value i.e. move the cursor to a point on either curve to the left of the intersection point. Then specify the Upper Bound point by moving the cursor to the right of the intersection point. Lower and upper bounds are defined by the x values.