Intro Proportional Relationships

How do you know whether 2 quantities are proportional?

Is there a proportional relationship between x and y? Explain.

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CCSS.7.RP.A.2A

The relationship between x and y is proportional. When x is 3, y is 51. What is x when y is 204?

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CCSS.7.RP.A.2C

The equation y=0.25x describes a proportional relationship between x and y. What is the constant of proportionality?

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CCSS.7.RP.A.2B

The equation y=1/9 x relates proportional quantities x and y. What is the value of x when y is 4?

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CCSS.7.RP.A.2C

The graph shows a proportional relationship between the number of miles Marco bikes and the number of hours. What equation relates the distance, y, and the time, x?

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CCSS.7.RP.A.2D

At the nearest wholesale store, 3 bags of cereal cost $21.75. At this rate, how much would 5 bags of cereal cost?

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CCSS.6.RP.A.3B

Sandra signed up for Workout Jazz during the spring special. Her credit card was charged $220.87. Is his the correct amount? Explain.

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CCSS.7.EE.B.3