Third Degree Polynomial Derivative Directions: Default Functions: Refresh Button: To reset the applet, click the Refresh Button at the top-right corner. Zoom In/Out: Using your scroll wheel, you can zoom in and zoom out of the applets visible area. The screen tends to re-center wherever the mouse cursor is located. Move: Hold the Shift key and then click and hold your primary mouse button to pan around the visible area of the applet. Movable Objects: Sliders: A, B, C, D: Changes the coefficients of the third degree polynomial. Adjust Tangent Length: Extends and retracts the length of the tangent line. Animate: Click and drag the point across the slider to watch the slope of the tangent line form the derivative of the polynomial at each corresponding x-value.