Derivative graph matcher: f ↔ f′

Click in the lower pane to place a zero of f′ where f turns or pauses. Then set the sign of f′ on each interval.

Zeros of f′. Click the lower pane, or type an x and add. Each zero either crosses or touches the axis.

Sign of f′ on each interval. Click to cycle ? → + → −.

Features of f. Choose a label, then click the upper pane at the x where it belongs, or type an x and add.