Select all the correct answers. Which relations are functions?
х
у
-2
-4
-2
-6
0
-8
2
-10
х
у
0
4
10
5
20
6
10
7
х
у
2
-10
1
-20
0
-10
-1
-20
х
у
2.5
lo
3.5
4
4.5
8
6.5
12
у
-10
4
-20
5
0
6
-10
7

The 3rd and 4th option

Explanation:
A function only works when the input (x) only has one output (y).
The first, second, and the last option has the input has two or more outputs.

Fun Fact:
It is okay for the outputs to have more then in input, but not okay for the input to have more then one output.

I hope this help and have a nice day :)