consumer magazine collected the following data for the fuel efficiency of cars (miles per gallon) compared to weight (thousands of pounds). e = 49 - 8.4w w is the weight (1000s of pounds) and e is the fuel efficiency (mpg). Fuel Efficiency (mpg)
a. What does the -8.4 in the equation represent? What are the units on this number? 18
b. What does the 49 in the equation represent? What are its units? 14 1.5 4 45 2 2.5 3 3.5 Weight (1000s pounds)
C. Describe the association between fuel efficiency and weight.
d. Cheetah Motors has come out with a super lightweight sports utility vehicle (SUV) that weighs only 2800 pounds. What does the model predict the fuel efficiency will be?
Answer:A consumer magazine collected the following data for the fuel efficiency of cars (miles per gallon) compared to weight (thousands of pounds). e = 49 â 8.4
