Lessons 8–9: Representing Proportional Relationships with Equations

Essential Question: Can you use the constant of proportionality in an equation to represent a real world example?

7.RP.2b

Warm up

S S.29 Example 1: Do we have enough gas to make it to the gas station?

7.1.8.Exa1a

Lesson

T

Discussion

7.1.8.Discussion

 

 

T S.29 Example 1 Continued

7.1.8.Exa1b

 

S

S.30 Example 2: Andrea’s Portraits (Group Work)

7.1.8.Exa27.1.8.Exa2c

Summary

7.1.8.Summary

Problems

S S.31-32

 

Exit

7.1.8.Exit

 

 

7.1.8.Exit2

Essential Question: Can you use the constant of proportionality in an equation to represent a real world example?

7.RP.2c

Warm up

S S.33

7.1.9.Exa1

Lesson

S S.34 Al’s Produce Stand

Discussion

  • Which makes more sense: to use a unit rate of “ears of corn per dollar” or of “dollars/cents per ear of corn”?
  • Based on the previous question, which would be the independent variable?
  • Which would be the dependent variable and why?
  • How do you write an equation for a proportional relationship in a generic form?

 

7.1.9.Exa2

 

Summary

7.1.9.Summary

 

Problems

S S.35-36

 

Exit

7.1.9.Exit