Learning goals: Teacher Facing Calculate the average rate of change of a function over a specified interval. Explain (in writing) how well given rates of change reflect the changes in an exponential function. Understand that an exponential function, unlike a linear function, has different average rate of change values for different intervals. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from Alg1.5 Introduction to Exponential Functions, Algebra 1.