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# Math Curriculum

### Level DUnit: Ratios and ProportionsKey Lesson 7.2.2 Introducing Proportional Relationships with Tables

Lesson topic: Constant of proportionality

## Instructor Materials

• Teacher guide
• Slides
• Practice Problems resource
• CCRS standard: 7.RP.2, 7.RP.2a, 7.RP.2b
• Learning goal: Comprehend that the phrase “proportional relationship” (in spoken and written language) refers to when two quantities are related by multiplying by a “constant of proportionality.” Describe (orally and in writing) relationships between rows or between columns in a table that represents a proportional relationship. Explain (orally) how to calculate missing values in a table that represents a proportional relationship.
• 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/.