Choose two points on the graph
Write the coordinates as ((x_1, y_1)) and ((x_2, y_2))
Subtract the y-values: (y_2 – y_1)
Subtract the x-values: (x_2 – x_1)
Divide the change in y by the change in x
Use the slope formula: (m = frac{y_2 – y_1}{x_2 – x_1})
Simplify the fraction if possible
Check whether the line rises, falls, is horizontal, or is vertical
A positive slope means the line rises from left to right
A negative slope means the line falls from left to right
A slope of 0 means the line is horizontal
An undefined slope means the line is vertical