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Math Help - Inversely Proportional

  1. #1
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    Inversely Proportional

    If y varies inversely as x, and y=12 when x=6, what is K, the variation constant?
    Cross Multiplying XY = K
    i.e. 6*12 = 72
    So k= 72??
    Similarly
    If x inversely proportional to y, and x=60 when y=0.5, find x when y=12.
    From the first part K = 30
    So X = 30/12 = /2 = 2.5

    Right??
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  2. #2
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    Quote Originally Posted by askmemath
    If y varies inversely as x, and y=12 when x=6, what is K, the variation constant?
    Cross Multiplying XY = K
    i.e. 6*12 = 72
    So k= 72??
    Similarly
    If x inversely proportional to y, and x=60 when y=0.5, find x when y=12.
    From the first part K = 30
    So X = 30/12 = /2 = 2.5

    Right??
    Looks good to me!

    -Dan
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