Question

Below you are given information on Jim's Hair Cut profit (in thousands) for the past 6 months.  Use regression analysis to obtain an expression for the linear trend projection ŷ = ________.

Month	Sales
1	2.52
2	3.08
3	2.96
4	3.14
5	3.21
6	2.99

Answer 1

Month(x)	Sale(y)	xy	X^2
1	2.52	2.52	1
2	3.08	6.16	4
3	2.96	8.88	9
4	3.14	12.56	16
5	3.21	16.05	25
6	2.99	17.94	36
21	17.9	64.11	91	Total
3.5	2.9833			Average

ナβ χ 0.0834 2.9933-0, o$34x3.5-2.6913 2.6913 t O.Oy34χ