Question

1. Which set of ordered pairs is NOT a function?

a) {(3,1),(2,1),(1,2),(3,2)}
b) {(4,1),(5,1),(6,1),(7,1)}
c) {(1,2),(3,4),(4,5),(5,6)}
d) {(0,0),(1,1),(2,2),(3,3)}
please help me !!

Answer 1

I think it's a

Explanation:

a - many-to-many

b - many-to-one

c - one-to-one

d - one-to-one