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A sample of twelve student shows distance and time for commuting * distance 3 5 5 7 8 8 9 10 10 10 12 y time 5 10 15 20 15 20 25 25 25 30 35 35 a ) calculate r I) what Is the equation of the regression line callca ku late the coof. of determinism ra d ) if a student commuted 6 miles , estimate his / hor commuting tires e) If a student commuted I smiles , estimate hisf wee commuting force # widgets produced 3 5 16 15 25 cost per widget 55 52 48 32 25- 20 a calculate r Is what is the equation for the requestion line c) if 8 widgets are produced , estimate the cost per widget di if 35 widgets are produced, estimate the cost per widget ex calculate the coat. of determinism ya 16s Fertilizer 30 40 50 60 70 100 used 80 yield in hundred 5 14 24 31 35 38 35 pounds wheat Has calculate r 8 ) what is the equation for the regression line ( ) calculate the coat. of determinism v 2 d ) estimate the yield if 75 /'s fertilizer used ( ) estimate the yield if 1 10 16s fertilizer used 4 sales 13 9 8 13 7 10 11 8 9 advertising 4 1 4 8 2 6 7 13 8 a calculate v By what is thequation for the regression live () do sales and advertising appear to be related