The amount of money that Charlie saves each week is directly proportional to the amount he earns. Last week Charlie saved $32 on his earnings of $512. At the same rate, how much will Charlie save this week on his earnings of $448?

Question

Mathematics

Janae

20 April, 15:47

The amount of money that Charlie saves each week is directly proportional to the amount he earns. Last week Charlie saved $32 on his earnings of $512. At the same rate, how much will Charlie save this week on his earnings of $448?

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Answers (1)

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Kristian Davenport · Answer 1

If k is a constant of proportionality then we know from last week that

512 = k ·32 so k=512/32=16;

This week

448 = k · amount he saved

448=16· amount he saved

amount saved=448/16=28

Answer $28