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Finding Function for Set of Data?

  1. Feb 14, 2006 #1
    Finding Function for Set of Data????

    Anyone know how to find a function for a set of data (x and y table).... that make up a quadratic function (sort of like a part of a parabola)

    I know I can do it in the calculator with QuadReg, but I woudl really appricaite it if someone could please walk me through the way in which you would do it algebraically.

    Like if I had a sample set of data... how would I find the values for a, b and c in:

    y= ax^2 + bx + c

    I'm assuming that is the general formula typically used.
  2. jcsd
  3. Feb 14, 2006 #2
    Linear Algebra, least squares method.
  4. Feb 14, 2006 #3
    That looks like what I need to do BUT, I have found no tutorial that I can understand... anyone care to give an example .... that simplifies this process
  5. Feb 14, 2006 #4
    You need to take a course in linear alegbra.
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