Explain why you think the following pairs of data are positively related, negatively related, or essentially unrelated. If you think that there is a relationship, which is the explanatory variable?

a. The age (in days) and weight of male children less than 1 year old.

b. The age and chances of having breast cancer, for women between the ages of 40 and 80.

c. The age and height of people between the ages of 30 and 40.

d. The weight and gasoline mileage (miles per gallon) of 2010 cars.

e. The income and age of male lawyers aged 21 to 54.