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the sum of the residual values is equal to 0, epsilon used as symbol to represent the residual value in this formula here

epsilon = Yi - b1 - b2*Xi

b1 = mean value of Y - b2*mean value of X

and

b2 = (sum of Xi*Yi - n*mean value of X*mean value of Y)/(squared sum of Xi - n*squared mean value of X)

i checked out a few books out of the library, but none we're helpful at all and the textbook we use in class is pretty much useless, the teacher doesn't even use it

Can anyone help me out please?

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# Algebric proofs

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