Learning goals: Teacher Facing Calculate the output of a function for a given input using an equation in two variables, and interpret (orally and in writing) the output in context. Create an equation that represents a function rule. Determine (orally and in writing) the independent and dependent variables of a function, and explain (orally) the reasoning. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.5 Functions and Volume, Grade 8.