For each of the following indicate whether the expected relationship between the two variables will be positive (+), negative (-), or zero (0).

a. Air Temperature and the amount of snow on the ground.

b. the number of minutes of exercise per day and the score on a physical fitness test,

c. the number of years having a drivers license and age.

d. the number of pages in a textbook and the cost of the textbook

e. Age at which a child take its first step and the educational level of the parents