# What is the equation to find slope?

For two points (${X}_{1} , {Y}_{1}$) and (${X}_{2} , {Y}_{2}$), the slope of its line equals:
slope = "rise"/"run" = (Y_2 - Y_1)/(X_2-X_1
Slope = $\frac{2 - 1}{5 - 1} = \frac{1}{4}$