#### Linear Interpolation $\begin{gather}y = y_1 + (\frac{y_2 - y_1}{x_2 - x_1})(x-x_1)\end{gather}$ Interpolate a value of x at a value of y between known points (x<sub>1</sub>,y<sub>1</sub>) and (x<sub>2</sub>,y<sub>2</sub>)