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Suppose y varies directly as x. if the value of x is doubled, what happens to the value of y?
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Suppose y varies directly as x. if the value of x is doubled, what happens to the value of y?

User Blabus
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y varies directly as x => y = kx

If x is doubled then y is doubled.
(2y) = k(2x) => 2y = 2kx => y = kx
User Tony Tarng
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