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Math Help - equations

  1. #1
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    equations

    Use the linear regression feature of a graphing calculator to calculate the equation of a line given the following two points that the line passes through: (12, 8) and (14, -6).
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  2. #2
    Senior Member DivideBy0's Avatar
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    Using Linear Regression is overkill, but here's how I would do it on a TI-89.

    Press APPS.

    Select Stats/List Editor.

    In List1[1], input 12
    In List1[2], input 14
    In List2[1], input 8
    In List2[2], input -6

    Now F4 (Calc) -> Regressions -> LinReg(ax+b)

    Then input as follows (Press 2ND: VAR-LINK to search for the lists):
    X List: List1
    Y List: List2
    Store RegEqn to: y1(x)

    Then press ENTER one or two times.

    You should get

    y = -7x+92
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by nikki View Post
    Use the linear regression feature of a graphing calculator to calculate the equation of a line given the following two points that the line passes through: (12, 8) and (14, -6).
    Who would use linear regression to do this problem? I'm curious as to where it came from?

    -Dan
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