Regression: Finding the equation of the line of best fit
3 28 7 21 91 51.6 7 21 52.6 209.4 2 2 2 u n x S x n x y S xy xx xy So, 1.843 28 ˆ 51.6 1 xy S xx S E and ˆ ˆ 7 514 843 31. 985 0 yE 1 x u So the equation of the regression line is
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