The New Route 66? One of the most famous national highways from its beginnings in th...

The New Route 66? One of the most famous national highways from its beginnings in the 1920s until its demise around 1970 was Route 66. On its way from Chicago to Los Angeles, one of the last stops was San Bernardino, California. Now, a new transportation hub—the San Bernardino International Airport—is in the planning stages. Although no agreements with any air carriers have been signed, officials forecast 2 million passengers by 2030, as shown in the following table.

a. Based on the summary statistics in the line plots, which of the two models better fits the data?

b. Write the theoretical equation for the quadratic model.

c. Use the following printout to determine if the quadratic model contributes significant information to the prediction of y.

d. Use the following printout to determine if the quadratic term contributes significant information to the prediction of y, in the presence of the linear term.