The following table gives in years of cars and annual usuage if X=36 cosmputan the regression

Question

X	40	34	28	30	44	38	31
Y	32	39	26	30	38	34	28

Answer 1

Let A = {-18,-9,0,9,18,27}

= {x_n|x_n = x_n-1 + 9, x₁ = -18 & i ≤ n ≤ 6}

or

A = {x|x is a multiple of 9 }

= {9x |x∈ [-2,3]}