# Math Curriculum

## Level DUnit: Ratios and ProportionsKey Lesson 7.2.3 More About Constant of Proportionality

Lesson topic: Constant of proportionality

## Instructor Materials

• Teacher guide
• Slides
• Practice Problems resource
• CCRS standard: 7.RP.2, 7.RP.2b
• Learning goal: Compare, contrast, and critique (orally and in writing) different ways to express the constant of proportionality for a relationship. Explain (orally) how to determine the constant of proportionality for a proportional relationship represented in a table. Interpret the constant of proportionality for a relationship in the context of constant speed.
• 7.2 Assessment and Practice Problems

## Related Lessons

### Preparation

If students need additional lessons before this key lesson, use these supplemental lessons.

Used with permission:

1. IM K-5 Math was originally developed by Open Up Resources (OUR) and authored by Illustrative Mathematics® (IM), and is copyrighted 2017-2019 by Open Up Resources. It is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). OUR's K-5 Math Curriculum is available at https://openupresources.org/math-curriculum/.

3. The Illustrative Mathematics® name and logo are not subject to the Creative Commons license and may not be used without the prior and express written consent of Illustrative Mathematics®.

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