Consider the following data. Do heavier cars really use more gasoline? Suppose a car is chosen at random. Letxbe the weight of the car (in hundreds of pounds), and letybe the miles per gallon (mpg). The following information is based on data taken fromConsumer Reports(Vol. 62, No. 4).

x2943334723403452y2917221329172114

Given the least squares line=43.17850.6094x:

(a) Make a residual plot for the least-squares model. Be sure to plot the horizontal line aty= 0.

(b) Use the residual plot to comment about the appropriateness of the least squares model for these data.

The residuals seem to be scattered randomly around the horizontal line at 0. There do appear to be outliers.

The residuals seem to be scattered randomly around the horizontal line at 0. There do not appear to be any outliers.

The residuals do not seem to be scattered randomly around the horizontal line at 0. There do not appear to be any outliers.

The residuals do not seem to be scattered randomly around the horizontal line at 0. There do appear to be outliers.