Well, i am taking a first course in elementary statistics, so we do not actually prove anything at all. So i was wonderign how does one determine the line of best fit?(adsbygoogle = window.adsbygoogle || []).push({});

y=mx+b, where m is the slope of the line of best fit,

I know that the slope is equal to

m=SS(xy)/SS(x), where SS(x) is the sum of square of x, while SS(xy) the sum of the squares of x,y. also

b=[SUM(y)-m*SUM(x)]/n but i have no idea how one would come up with these expressions.

Can somebody show a proof for this, or just point me to the right direction?

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# The line of best fit. Need help?

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