The following data were collected during a study of consumer buying patterns: Observation 1 Observation 8 2 9 3 4 5 6 7 X 18 26 41 35 56 46 33 y= y 69 81 85 77 95 93 86 10 11 12 13 X 19 14 10. 25 21 29 b. Obtain a linear regression line for the data.(Round your intermediate calculations and final answers to 3 decimal places.) X y 81 75 76 83 86 90 y= c. What percentage of the variation is explained by the regression line? (Do not round intermediate calculations. Round your answer to the nearest whole percent. Omit the "%" sign in your response.) Approximately % of the variation in the dependent variable is explained by the independent variable. d. Use the equation determined in part b to predict the expected value of y for x = 44. (Round your intermediate calculations and final answers to 3 decimal places.)

if 4a+(7a)=65 what does a eqaul

" 33x+6=27x+2

A contractor orders 8 cubic yards of premixed cement, all of which is to be used to pour a patio that will be 4 inches thick. If the length of the patio isspecified to be twice the width, what will be the patio dimensions? (1 cubic yard = 27 cubic feet)