Question: I could use some help figuring out how to solve this: If y varies directly as x.When x is equal to 6 ,y is equal

I could use some help figuring out how to solve this:

If y varies directly as x.When x is equal to 6 ,y is equal to 4.What does x equal when y = 15?

A) 17

B) 1.6

C) 22.5

D) 10

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