2. An engineer wanted to determine how the weight of a car affects gas mileage. The following data represent th weights of various domestic cars and their gas mileages in the city. Weight (Ibs) 4724 4006 3097 3555 4029 3934 3242 2960 3530 3823 Miles per gallon 17 18 22 19 19 19 24 26 19 18 a) Compute the correlation coefficient. b) Perform a hypothesis test to determine if a significant linear relationship exists. c) If r is significant in this study, explain the relationship between weight of a car and its gas mileage