a. What is the equation of the least-squares regression line? Be sure to define any symbols you use.

b. Interpret the slope of the least-squares line.

c. One student reported that her 10-year-old car had 110,000 miles on it. Find and interpret the residual for this data point.

Thirty randomly selected seniors at Council High School were asked to report the age (in years) and mileage of their main vehicles. Here is a scatterplot of the data:

We used Minitab to perform a least-squares regression analysis for these data. Part of the computer output from this regression is shown here.

Transcribed Image Text:

200,000 - • Represents 2 points 100,000 0.0 2.5 5.0 7.5 10.0 Age (years) ... .. Mileage