Type and enter the equation that you think the graph shown on-screen best represents.

Every incorrect guess will subtract 1 from your score, while correct guesses will add 20.

You can view individual point values and general graph shape to help you decide what kind of equation fits best.

On the graph, you can click and drag to change graph scaling or to view different x and y values.

Double-clicking the graph will set its scale and position back to the default.