Learning goals: Teacher Facing Compare and contrast the density of uniformly distributed dots in squares. Create an equation and a graph that represent the proportional relationship between the area of a square and the number of dots enclosed by the square. Interpret the constant of proportionality in models of housing per square kilometer or population of people per square kilometer. Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 7.9 Putting it All Together, Grade 7.