b) The following data were collected during a study of i). ii). iii). Observation 1 2 3 4 5 6 7 8 9 10 11 12 13 X 15 25 40 32 51 47 30 18 14 15 22 24 33 y 74 80 84 81 96 95 83 78 70 72 85 88 90 [15 marks] Obtain a linear regression model for the data. What percentage of the variation is explained by the regression line? Use the equation determined in part (i) to predict the expected value of y for x = 41.

b) The following data were collected during a stuay [15 marks] i). Obtain a linear regression model for the data. i). What percentage of the variation is explained by the regression line? Use the equation determined in part (i) to predict the expected value of y for x=41