You can type in any function you like for [math]f\left(x\right)[/math].[br][br]The graph above shows the average rate of change from a point [math]P\left(x,y\right)[/math] to a point [math]\left(x+h,f\left(x+h\right)\right)[/math]. You can set [math]h[/math], which is the change in the [math]x[/math]-coordinate. [br][br]You can also drag point [math]P[/math] anywhere you would like along the curve.[br][br]Click and drag the grid to move around. Zoom by scrolling up/down.[br]