Question

Which of the following sets of ordered pairs is a function?

a) {(2,3) (3,4) (3,5) (5,6) }
b) {(1,5) (2,6) (3,7) (4,8) }
c) {(3,4) (5,7) (5,8) (7,9) }

Answer 1

(1,5) (2,6) (3,7) (4,8)