=+53. All the efficiency money can buy 2013. A sample of 61 model-2013 cars from an online information service was examined to see how fuel efficiency (as highway mpg) relates to the cost (Manufacturer’s Suggested Retail Price in dollars) of cars. Here are displays and computer output:

25 30 35 40 45 50 Highway MPG 20000 25000 30000 35000 MSRP Dependent variable is: Highway MPG R-squared = 10.36%