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Linear and Non-Linear Regression

  1. Mar 2, 2010 #1
    1. The problem statement, all variables and given/known data
    Well I have conducted a regression analysis, and have plotted a graph of my residuals vs my input variable. I know that for a linear regression the residuals must be randomly scattered blahblah, but from this graph, it looks like it has a curve to it ? is this because I only have 10 points, or is it not linear?
    If it is not linear, where do I go from there?

    2. Relevant equations

    3. The attempt at a solution
    Assuming it is not linear, I tried to do the log to the base ten of my output, and ended up with a slightly smaller value of R squared. I also tested with cubic and quadratics, they seem to have a larger value of R squared.
    Last edited: Mar 2, 2010
  2. jcsd
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