Question 120859
This is the function equation

x  2  1  -1 -2 -4  
y 12 48  48 12  3

What is the function? 
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It's not linear.
I tried Quadratic Regression; it's not Quadratic
It's not Cubic
Quartic Regression gives: y = (3/4)x^4-15.75x^2+63
with R^2 = 1.
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Cheers,
Stan H.
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