Which set of ordered pairs is not a function? a. (4, –2), (–2, 2), (2, –2), (4, 2) b. (–4, 2), (–2, 2), (2, 2), (4, 2) c. (–4, 2), (–2, –2), (2, 2), (4, 2) d. (–4, –2), (–2, –2), (2, 2), (4, 2)

B. (-42)

Afunction can have individual x values that correspond to the same y values but this cannot be revered.  a) x value 4 has 2 corresponding y-values (correct)b) y value 2 has 2 corresponding x values (incorrect)  c) y-value 2 has 2 corresponding x values (incorrect)  d) correct because no x or y values have 2 other values.  hope i : ) 

The answer to the question is d