Which pair of variables below are probably correlated, but the correlation is not a linear one?
A) age and earned income for ages 16 to 90.
B) automobile weight and gasoline mileage
C) earned income and monthly house payment
D) alcohol consumption and severity of marital problems

Question

Quizplus · Accepted Answer

The relationship between age and earned income is likely to be non-linear because income tends to increase with age up to a certain point (as people progress in their careers) but then may decrease or plateau as people retire or reduce their working hours.

Which Pair of Variables Below Are Probably Correlated, but the Correlation