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Math Help - The eq of 2 regression lines are

  1. #1
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    The eq of 2 regression lines are

    The equations of 2 regression lines are
    8x - 10y + 66 = 0 , 40x - 18y - 214 = 0

    Obtain the standard deviation of Y is standard deviation of X is 3
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  2. #2
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    Your 2 equations 8x - 10y + 66 = 0 , 40x - 18y - 214 = 0 need to be put in the form y=a+bx as this form helps us identify parameters like the standard deviation and the mean.

    Note that for y=a+bx

    b = r\times \frac{s_y}{s_x}

    a = \bar{y} -b\bar{x}

    so do you have any additional information?
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