Drive my car (3.2, 4.3)

(a) Explain what the value of r2 tells you about how well the least-squares line fits the data.

(b) The mean age of the students’ cars in the sample was x– = 8 years. Find the mean mileage of the cars in the sample. Show your work.

(c) Interpret the value of s in the context of this setting.

(d) Would it be reasonable to use the least-squares line to predict a car’s mileage from its age for a Council High School teacher? Justify your answer.