Secant Slope Calculator

This app can be used to find the slopes of secants to the curve of (in blue). Sliders are provided to move either or . The calculation of the slope is shown. By moving very close to , this app can be used to find an approximation for the slope of a tangent to this curve. Alternatively, you can type "x_2=" followed by your choice of the value in the input bar at the bottom.
The function can be changed by typing another function into the input bar.