Learning goals: Teacher Facing Create an equation to represent certain expenses for a restaurant, and interpret (orally and in writing) the solution. Determine whether a relationship is proportional and explain (orally) the reasoning. Determine whether a restaurant is making a profit using estimates of ongoing expenses, number of meals sold, average price per meal, and average cost per meal. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.9 Putting it All Together, Grade 7.