Determine whether the following relation is a function.

{(3,7), (3,8), (3,-2), (3.4),(3,1)}

Ait is a function because the ordered pairs all have the same x-value.

Bit is not a function because there are multiple y-values paired with a single x-value.

Cit is a function because none of the ordered pairs have the same y-value.

Dit is not a function because none of the ordered pairs have the same y-value.