9. [-/1 Points] DETAILS PODSTAT6COREQ 13.1.005. MY NOTES ASK YOUR TEACHER A sample of small cars was selected, and the values of x = horsepower and y = fuel efficiency (mpg) were determined for each car. Fitting the simple linear regression model gave the estimated regression equation y = 56.0 - 0.190x (a) How would you interpret b = -0.190? O For each one-unit increase In horsepower the predicted fuel efficiency Increases by 0.190 mpg. For each one-unit Increase in horsepower the predicted fuel efficiency decreases by 0.190 mpg. O For each one-unit Increase in mpg the predicted horsepower decreases by 0.190 horsepower. For each one-unit decrease in mpg the predicted horsepower decreases by 0.190 horsepower. O For each one-unit increase in mpg the predicted horsepower increases by 0.190 horsepower. (b) Substituting x = 100 gives y = 37. Give two different interpretations of this number. (Select all that apply.) O An estimate of the mean fuel efficiency when the horsepower is 37. O An estimate of the mean fuel efficiency when the horsepower is 100. O A prediction for the fuel efficiency of a car whose horsepower is 100. An estimate of the horsepower when the fuel efficiency is 100. O A prediction for the fuel efficiency of a car whose horsepower is 37. (c) What is the predicted efficiency for a car with a 300-horsepower engine? 9 = Does this result seem reasonable? Why or why not? O This result cannot be valid, and has probably occurred because 300 is outside the range of the horsepower ratings for a car, O This result is valid, and has probably occurred because 300 is outside the range of the horsepower ratings for the small cars used in the sample. This result cannot be valid, and has probably occurred because 300 is outside the range of the horsepower ratings for the small cars used in the sample O This result is valid, and has probably occurred because 300 is inside the range of the horsepower ratings for a car. 7:27 PM 20 74"F W O O 4/27/2022