Unit 3 - Lesson 2 - Grade 8: Illustrative Mathematics

Write an equation for each different proportional relationship you find.

After 30 seconds, which tank has the most water?

Select the graph you used to answer the previous question.

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At approximately what times do both tanks have the same amount of water?

Select the graph you used to answer the previous question.

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At approximately what times do both tanks contain 1 liter of water? 20 liters?

Select the graph you used to answer the previous question.

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Which one of these relationships is different than the other three?

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Explain how you know.