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# Laura spent $20 for 5 books. Bryan spent $36 for 9 books. If this is a proportional relationship, what is the constant of proporti

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Laura spent $20 for 5 books. Bryan spent $36 for 9 books. If this is a proportional relationship, what is the constant of proportionality between money and books bought?

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Math Middle School
1 month
2022-12-31T12:31:41+00:00
2022-12-31T12:31:41+00:00 2 Answers
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## Answers ( 2 )

The answer is that each book is 4$. We know this because 5 times 4 is 20 which is true for the problem and 9 times 4 is 36 which is true for the problem