Lesson plan

7. Players and Coaches: Using equations to show proportional relationships

teaches Common Core State Standards CCSS.Math.Content.7.RP.A.2 http://corestandards.org/Math/Content/7/RP/A/2
teaches Common Core State Standards CCSS.Math.Content.7.RP.A.2c http://corestandards.org/Math/Content/7/RP/A/2/c
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Students will choose an equation that represents the relationship between and independent and dependent variable related by a constant of proportionality. This lesson builds on students' work with constant of proportionality. This task requires students to select the correct equation to relate the number of coaches and players in a soccer league as well as create a table and graph to defend their thinking. The mathematical concepts in this lesson build toward writing equations of proportional relationships. Big Idea: In the equation of a proportional relationship, the constant of proportionality relates the independent and dependent variables. Vocabulary: constant of proportionality, dependent variable, independent variable, equation Special Materials: graph paper, rulers