which of the tables below doesn’t represent a function?
table a
x y
5 1
2 4
3 6
0 6
table b
x y
7 7
6 3
0 4
9 0
table c
x y
5 7
9 2
1 5
5 5
table a
x y
5 1
2 4
3 6
0 6
table b
x y
7 7
6 3
0 4
9 0
table c
x y
5 7
9 2
1 5
5 5