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5 votes
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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4 votes
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
User GregD
by
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1 vote

Answer:

4 dollars per book

Explanation:

For ever book, 4 dollars is added to the total amount

User Martin Kool
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