1.Which set of ordered pairs is NOT a function?
a. {(1,4), (2,3), (3,2), (4,3)}
b. {(2,3), (3,2), (4,4), (5,2)
C. {(-2,3), (4,1), (2,-1), (1,5)}
d. {(-2,3), (1,4), (-2,-1), (1,5)}

2. As a babysitter, you earn $5 for every hour you babysit. Which is the dependent variable?

a. number of hours you babysit
b. number of children you babysit
c. amount of money you earn per hour
d. total amount of money you earn​