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Math Help - Direct Variation

  1. #1
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    Thumbs down Direct Variation

    First of all, I am new ,so hello.

    now to the topic:
    is the formula for direct variation y=kx
    and could you please post examples?
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by Russian View Post
    First of all, I am new ,so hello.

    now to the topic:
    is the formula for direct variation y=kx
    and could you please post examples?
    This is correct. y varies directly as x.

    k is called the constant of proportionality or the constant of variation.

    Google: direct variation - Google Search
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  3. #3
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    Cool

    Quote Originally Posted by masters View Post
    This is correct. y varies directly as x.

    k is called the constant of proportionality or the constant of variation.

    Google: direct variation - Google Search
    so you use the formula and then plug the answer as k?
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  4. #4
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    Quote Originally Posted by Russian View Post
    so you use the formula and then plug the answer as k?
    Example: d = rt (distance = rate X time)

    Let r be the constant of variation.

    The distance (d) varies directly as time (t) if r remains constant. In other words, when t increases, d increases. When t decreases, d decreases.

    Follow some of the links I gave you and you'll see other examples.

    Also, investigate inverse and joint variation as well.
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  5. #5
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    Cool

    Quote Originally Posted by masters View Post
    Example: d = rt (distance = rate X time)

    Let r be the constant of variation.

    The distance (d) varies directly as time (t) if r remains constant. In other words, when t increases, d increases. When t decreases, d decreases.

    Follow some of the links I gave you and you'll see other examples.

    Also, investigate inverse and joint variation as well.
    thank you, masters
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