For Exercises 37–51, do the following for the indicated data sets from the Section 4.1 exercises:

  1. Calculate the slope and the intercept of the regression line.
  2. State the regression equation in words.
  3. Interpret the value for the slope of the regression line, in terms of the variables from the particular exercise.
  4. Interpret the value for the intercept of the regression line, in terms of the variables from the particular exercise.

Question 4.142

displacement

44. Engine Displacement and Gas Mileage. The table provides the engine displacement (size, in liters) and the city mpg (miles per gallon) gas mileage of a random sample of 12 vehicles taken from the Chapter 6 Case Study data set, FuelEfficiency.

Vehicle Engine
displacement		 City mpg
GMC Yukon Denali 6.2 13
Ford E350 Wagon 5.4 11
BMW435i Coupe 3.0 20
Land Rover Range Rover 5.0 13
Infiniti Q50a 3.7 19
Dodge Journey 3.6 17
Jaguar XF 5.0 15
Dodge Challenger 6.4 14
Toyota Highlander Hybrid 3.5 28
Mercedes-Benz S550 4.7 17
Ford Fiesta 1.6 29
Hyundai Elantra 2.0 24