The intersection option is used to determine a point of intersection of two graphs. While viewing a graph, press .

Press . (The intersection option can also be obtained by using the cursor to select option 5 and pressing .)

The cursor appears on the first graph indicated by the "1" in the upper right-hand corner of the screen. (The selected curve is changed by pressing the or . Press when the desired curve is selected.) The question "1st Curve?" appears at the bottom of the screen. Press .

The question "2nd Curve?" appears at the bottom of the screen. Press .

The question "Lower Bound?" appears at the bottom of the screen. Press the or to move the blinking cursor to the left of the point of intersection. Press .

The question "Upper Bound?" appears at the bottom of the screen. Press the or to move the blinking cursor to right of the point of intersection. Press .

The coordinates of the point of intersection appear at the bottom of the screen. Here, the point of intersection is (0,0).