HELPPPP
All of the following relations represent functions, except which?
Responses

{(1, 2), (-2, 2), (5, 2), (4, 2)}

{(7, 8), (7, 9), (7, 10), (7, 11)}

{(0,0)}

{(1, 4), (-2, 8), (2, 2), (4, 9)}


PLEASE SHOW STEP BY STEP!