Intersection Option
The intersection option is used to determine a point of intersection
of two graphs. While viewing a graph, press
to view the math menu.
Press 
to select the intersect option.
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 cursor appears on the second graph indicated by the "2" in the upper right-hand
corner of the screen. Press when the second desired curve is
selected and the cursor is near the desired point.
The coordinates of the point of intersection appear at the bottom of the screen.
Here, the point of intersection is about (2.208,6.791).