Cigarettes smoked per day x: 60, 30, 24, 12, 45, 33, 52, 20, 10 Age of death y: 55, 80, 78, 88, 51, 46, 37, 62, 75 what is the regression equation: Y-hat=bx+a

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Cigarettes smoked per day x: 60, 30, 24, 12, 45, 33, 52, 20, 10

Age of death y: 55, 80, 78, 88, 51, 46, 37, 62, 75

what is the regression equation: Y-hat=bx+a

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to compute b, I used the equation: b=sp/ssx

b= -1821.89/2449.56=-.74

to compute a, I used the equation: a=My-bMx

a= 63.56-(-.74 x 31.78)

a=87.08

Y-hat= -.74x + 87.08

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