For the 100 cars on the lot of a used-car dealership, would you expect a positive association, negative association, or no association between each of the following pairs of variables? Explain why.
a. The age of the car and the number of miles on the odometer
b. The age of the car and the resale value
c. The age of the car and the total amount that has been spent on repairs
d. The weight of the car and the number of miles it travels on a gallon of gas
e. The weight of the car and the number of liters it uses per 100 km.*