Question

Determine which relation is a function.


A.


{(–3, 3), (–2, 3), (–1, 1), (0, 4), (0, 1)}


B.


{(–3, 2), (–1, 3), (–1, 2), (0, 4), (1, 1)}


C.


{(–3, 2), (–2, 3), (–1, 1), (0, 4), (0, 1)}


D.


{(–3, 2), (–2, 3), (–1, 2), (0, 4), (1, 1)}

Answer 1

Since x=0 produces y=4 and y=1, the relation (−3,3),(−2,3),(−1,1),(0,4),(0,1) is not a function.
The relation (−3,3),(−2,3),(−1,1),(0,4),(0,1) is not a function.