Use the slope formula: (m=frac{y_2-y_1}{x_2-x_1})
Identify two points on the line: ((x_1,y_1)) and ((x_2,y_2))
Subtract the y-values
Subtract the x-values
Divide the change in y by the change in x
Simplify the fraction if needed
If the line is horizontal, the slope is (0)
If the line is vertical, the slope is undefined
If given a graph, count rise over run
If given an equation in slope-intercept form, use the coefficient of (x) as the slope
If given a table, use two points and apply the slope formula