Identify all of the functions below.
{(5,1),(,2,2),(6,6),(3,4),(1,1).
x y
7 3
0 5
1 3
5 5
3 0.
{(5,1),(-5,2),(2,6),(6,4),(-2,1).
{(5,1),(2,2),(2,6),(2,4),(1,1).
{3,5,9,7,7).
x y
2 3
2 5
1 3
8 2
5 0
PLS HELP ASAP!!!