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Math Help - Solving Variation Equations

  1. #1
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    Solving Variation Equations

    Hey everyone... I'm having problems with two questions from my Algebra 2 book. The questions are about Variation Equations.

    There are two types of problems that I want to go over so any help is appreciated. Thanks.
    ---------------------------------

    9. y varies directly as x. If x = 4, then y = -12. Find y when x = -7.

    11. y varies inversely as the cub of x. If x = 4, y = -1/16. Find y when x = 1/2.
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  2. #2
    No one in Particular VonNemo19's Avatar
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    Quote Originally Posted by CzWJF41 View Post
    Hey everyone... I'm having problems with two questions from my Algebra 2 book. The questions are about Variation Equations.

    There are two types of problems that I want to go over so any help is appreciated. Thanks.
    ---------------------------------

    9. y varies directly as x. If x = 4, then y = -12. Find y when x = -7.

    11. y varies inversely as the cub of x. If x = 4, y = -1/16. Find y when x = 1/2.
    "Varies directly" implies that -12=k(4)

    "Varies inversly" implies -12=\frac{k}{4}

    Where k is constant.
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