### Slope equation: m = $\frac{y_2-y_1}{x_2- x_1}$

In this lesson, we will try to determine slope of a straight line with different methods, for example, rise-over-run and slope formula. We only need any two of the following things: a point on a line, the slope of the line or two points on the line, we can easily find the equation of the line by using this point-slope formula. However, if you have the graph of the line and only need to find the slop, using the rise-over-run is your best way to solve the question.