Question 1176089
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Go to GOOGLE and request "linear regression online calculator".


It will give you tens web-sites with free of charge such online calculators.



Use any of them; for example, this one


http://www.alcula.com/calculators/statistics/linear-regression/#gsc.tab=0



It has a convenient input and nice desription/instructions.


Input your data; click the "solve" button and get the answer (regression formula).


Use it to solve your problem.
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