Identify two points on the function: ((x_1, f(x_1))) and ((x_2, f(x_2)))
Compute the change in the output: ( Delta y = f(x_2) – f(x_1) )
Compute the change in the input: ( Delta x = x_2 – x_1 )
Use the average rate of change formula: ( dfrac{Delta y}{Delta x} = dfrac{f(x_2) – f(x_1)}{x_2 – x_1} )
If needed, simplify the fraction or round to the desired precision
Note: (x_2 ne x_1) to avoid division by zero