1. The problem statement, all variables and given/known data Hi, the problem that I am struggling with is getting an appropriate method to produce non - linear line of regression when the data follows non - linear pattern. 2. Relevant equations Would it be appropriate to use Newton's interpolating polynomial or Lagrange's polynomial at such circumstances? (one could select the most appropriate data points and then construct a polynomial using either method). Perhaps there are other methods that could be in this situation?