Unit 4, Lesson 17
Two Related Quantities, Part 2
Accelerated 6
17.1
Warm-up
Instructional Routines
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In this Warm-up, students reason about the relationship between distance, rate, and time to solve a problem. The purpose is to activate the idea that constant speed can be represented by a set of equivalent ratios associating distance traveled and elapsed time. In the longer activity that follows, students represent the relationship between these two quantities using a table, equations, and graphs.
As students work, monitor for different representations used (particularly tables) as well as for students who calculate each wheelchair’s speed in meters per second or each wheelchair’s pace in seconds per meter.
Launch
Arrange students in groups of 2. Give students 3–4 minutes of quiet work time and 1–2 minutes to share their thinking with a partner. Follow with a whole-class discussion.
If needed, remind students of tools or strategies that may be appropriate for solving this problem, including double number line diagrams or tables of equivalent ratios. Consider allowing students to use calculators to ensure inclusive participation in the activity.