<PRE><B>Question 153166</B>
I entered the data in a TI-83.
I ran the LinReg, QuadReg, CubReg, QuartReg programs against the data.
Best fit is with the cubic and quartic regressions.
With both the R^2 values are 0.999... indicating a close fit.
Visually both track the data very well.
The cubic is y = -0.004075x^3+0.153565x^2-1.275736x+18.272879
The quartic is y = 9.7x10^-5x^4 - 0.008354x^3 + 0.21674x^2 -1.63x+18.863421
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Cheers,
Stan H.</PRE>