Which of the following tables do NOT represent a function?
A. X 1 3 7 5 2 4
Y 3 3 3 3 3 3
B. X 9 4 2 5 6 4
Y 7 4 9 2 5 4
C. X 7 8 2 5 1 7
Y 7 5 9 2 5 3
D. X 1 3 2 5 6 4
Y 6 4 3 3 5 1
A. X 1 3 7 5 2 4
Y 3 3 3 3 3 3
B. X 9 4 2 5 6 4
Y 7 4 9 2 5 4
C. X 7 8 2 5 1 7
Y 7 5 9 2 5 3
D. X 1 3 2 5 6 4
Y 6 4 3 3 5 1