A study was conducted using data from 32 automobiles to relate gasoline mileage y (miles per gallon) to engine displacement x (cubic inches). Use this data to answer Questions 31 through 38. The data are linked below.

Mileage Displacement 18.9 350 17 350 20 250 18.25 351 20.07 225 11.2 440 22.12 231 21.47 262 34.7 89.7 30.4 96.9 16.5 350 36.5 85.3 21.5 171 19.7 258 20.3 140 17.8 302 14.39 500 14.89 440 17.8 350 16.41 318 23.54 231 21.47 360 16.59 400 31.9 96.9 29.4 140 13.27 460 23.9 133.6 19.73 318 13.9 351 13.27 351 13.77 360 16.5 360a. Ha: B1 = 0 b. Ha: B1 0 e. Ha: B1 > 0 f. Ha: B1