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05-11-2017
Mathematics

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Suppose y is directly proportional to x, also suppose y=15 when x=8.

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05-11-2017

If y is directly proportional to x then:

y=kx, for some integer

Let's find k, when x=8 then y=15
y=kx
(15)=8k
15/8=8/8k
k=15/8

y=15/8x

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