Determine which of the following relations is a function.
x
-10
50
-5
50
10
y
10
5
0
-5
-10
D
x
-3
-1
0
0
3
NE
2
1
2
4
0
x
-8
-2
1
2
4
y
-4
-2
3
4
6
x
0
1
2
2
LO
5
92
42
2
6
7