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Math Help - Line representing coordinate dots?

  1. #1
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    Line representing coordinate dots?

    been awhile since I've been in any math classes and i forgot what this is even called.... lets say I have the coordinates:

    (2, 27.69),(4,29.35),(6,29.32),(8,28.5),(10,29.82)

    and I want a line that represents the general slope of these coordinates... what is it called and how do i do it?
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  2. #2
    Eater of Worlds
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    It's called a linear regression. And your data results in a 'not too accurate' one.

    A quartic regression would be better.

    Using your data I get a quartic of

    y=.005286x^{4}-.086979x^{3}+.303854x^{2}+.807917x+25.47

    This has an R^2 of 1 and that is as good as it gets.

    When doing a regression, the closer R^2 is to 1, the better.

    A linear regression resulted in about .4. That is bad.

    You can do these with Excel or any decent calculator.
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  3. #3
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    Quote Originally Posted by solace85 View Post
    been awhile since I've been in any math classes and i forgot what this is even called.... lets say I have the coordinates:

    (2, 27.69),(4,29.35),(6,29.32),(8,28.5),(10,29.82)

    and I want a line that represents the general slope of these coordinates... what is it called and how do i do it?
    Please do not ask for help in Live Chat. It's for small talk, not asking maths questions.
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