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This is the given data table

--------Jan----Feb----Mar---Apr----May----Jun----July----Aug----Sept----Otc----Nov----Dec

Maximum:33.2--32.2--31.2--28.9----25.4----22.2--21.9----23.9----27---- 29.8----31.7----32.9

This is a temperature table and i need to find its sine equation.

b3/

y= AsinB(x-C) +D

A=(max-min)/2=(33.2-21.9)/2=5.65

The period is 12 months, so 2pi/B=12 => B= pi/6

D=(max+ min)/2= (33.2+21.9)/2=27.55

C is the half way from the first minimum to the next maximum:

Min: July / 7 Max: January / 13

C=(max+ min)/2=(13 + 7)/2=10

So the equation is: y=5.65sin((pi/6) (x-10))+27.55

Well, I want to ask did i do anything wrong?

How to improve this equation to fit the numbers better because the numbers werent fitted on my graph.

THanks

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# Homework Help: Im seeking for help about fitting data into a curve of sine formula

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