3. *
1 point
Which of the following sets of ordered pairs is NOT a function?
A {(6, 8), (6, 7), (6, 6), (6, 2)}
B {(-1, 2), (-3, 4), (-5, 2), (-6, 3)}
C {(8, 7), (7, 6), (5, 4), (3, -1)}
D {(2, 0), (3, 0), (4,0), (5, 0)}