Instructions:

1. Enter the function into the textfield, click the "Graph" button. Pan and zoom work as usual.
2. To graph the critical points, click the "Info" button, and seelct the "Crit" checkbox. If you pan or zoom the function, deselect then select the "Crit" checkbox.
3. You can get an approximate idea of the location of the critical points by clicking the mouse on the points. The (x,y) coordinates are displayed.
4. Only the critical points in the field of view are computed.
5. "Inc" will show intervals on which the function is increasing.
6. "Dec" will show intervals on which the function is decreasing.
7. "Inf" will graph inflection points.
8. "Convex" will show intervals on which the function is convex.
9. "Concave" will show intervals on which the function is concave.