Question 1206293
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Go to web-site 


https://www.emathhelp.net/en/calculators/probability-statistics/quadratic-regression-calculator/


Use free of charge online calculator there, specially developed and intended for finding best fitting parabolic curves.


Input your data and click the "Calculate" button.


You will get the answer next instance.


The calculator will provide it with great precision (ten or more decimal places for coefficients).


It will also explain you the methodology which it uses, and will provide all necessary formulas,
so it is like a self-sufficient textbook on the method, at the same time.