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Math Help - Linear law problem

  1. #1
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    Exclamation Linear law problem

    The diagram shows part of a straight line obtained by plotting log10 y against log10 x for two variables x and y. Find
    a) log10 y in terms of log10 x
    b) y in terms of x
    c) the valve of x when y = 40

    Can teach me how to do??Linear law problem-image-62-.jpg
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  2. #2
    Forum Admin topsquark's Avatar
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    Re: Linear law problem

    How far have you gotten on this?

    Hint: The "log(y) and log(x)" act as y and x values. So your line on the graph will be of the form:
    log_{10}(y) = m \cdot \log_{10}(x) + b, where m and b are the usual slope of the line, and b is the y-intercept.

    -Dan
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