For Exercises 2.44 and 2.45, see page 82; for 2.46, see page 84; for 2.47, see page 86; for 2.48 and 2.49, see page 88; for 2.50, see page 90; for 2.51, see page 90; for 2.52, see page 91; and for 2.53, see page 94.

Question 2.62

2.62 Fuel efficiency and CO2 emissions

In Exercise 2.37 (page 79), you examined the relationship between highway MPG and city MPG for 1067 vehicles for the model year 2014.

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  1. Use the city MPG to predict the highway MPG. Give the equation of the least-squares regression line.
  2. The Lexus 350h AWD gets 42 MPG for city driving and 38 MPG for highway driving. Use your equation to find the predicted highway MPG for this vehicle.
  3. Find the residual.