Learning goals: Teacher Facing Compare and contrast (orally) graphs of linear and nonlinear functions. Create an equation and a graph representing the volume of a cone as a function of its radius, and describe (orally and in writing) how a change in radius affects the volume. Describe (orally and in writing) how changing the input of a certain nonlinear function affects the output. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.5 Functions and Volume, Grade 8.