Proportional Relationships in Tables
Learning Objective
I can determine if a table represents a proportional relationship by checking if the ratio between y and x is constant.
Practice Questions
This lesson includes 2 practice questions to reinforce learning.
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1. A bakery sells cookies. The table below shows the cost for different numbers of cookies. | Number of Cookies (x) | Cost (y) | |---|---| | 2 | $4 | | 4 | $8 | | 6 | $12 | | 8 | ? | What is the constant of proportionality (k)? What is the missing cost for 8 cookies? Explain how you found your answers.
2. A group of friends is having a car wash to raise money. The amount of money they raise is proportional to the number of cars they wash. If they wash 5 cars, they earn $25. A) Write an equation in the form y = kx that represents this relationship, where x is the number of cars washed and y is the amount of money earned. B) If the group wants to earn $150, how many cars do they need to wash? Show your work.
Educational Video
Proportional Relationships in Tables | 7th Grade Math Lesson
Mrs. Casias Math