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Math

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How do I set up this equation?

If Y varies directly as X and Y = 12 when X = 3, find Y when X = 16

  • Math -

    If y varies directly with x, then there must be some number "k" such as:
    y=k*x
    Y = 12 when X = 3...So?
    12=k*3
    k=12/3
    k=4
    Since you found k, then you can plug in to find Y.
    Y= 4*16
    Y= 64

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