I am trying to fit a polynomial to the data listed as
When I use
FittedModel[6.67-42.6435x+16.1427x^2-<<19>>x^3 +<<20>>x^4-0.00367168x^5 +0.0000409458x^6.
I don't understand why I am not getting any coefficients for the
x^4 terms that make sense and would like some assistance in solving this problem.