Example 1: Mother’s 10K Race

This Instructional Activity is a part of the Lesson 15, Unit 1, Grade 7. Review with students the meaning of unit rate, the meaning of an ordered pair in the proportional relationship context, the meaning of (0, 0), and the meaning of (1, r), from Lesson 10. The goal here is to help students see the relationship between the unit rate and the changes in x and y. Use the table to determine the constant of proportionality and remind students how this was done in earlier lessons. Help students to understand what the constant of proportionality means in the context of this problem.