Independent Practice Determine whether the relation is a function. Explain why or why not.

{(6, –7), (5, –8), (1, 4), (5, 5)}

A.
Yes; the domain value 5 corresponds to two range values, –8 and 5.

B.
No; the domain value 5 corresponds to two range values, –8 and 5.

C.
Yes; the range values are all different.

D.
No: 5 is both in the domain and in the range.