# Secant Slope Calculator

This app can be used to find the slopes of secants to the curve of $f(x)=\frac{1}{x}$ (in blue). Sliders are provided to move either $x_1$ or $x_2$. The calculation of the slope is shown. By moving $x_2$ very close to $x_1$, 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 $x_2$ value in the input bar at the bottom.

The function $f(x)$ can be changed by typing another function into the input bar.