Practice for Horizontal Line Test.

1 : Consider the following graph.

Does this graph represent a function?

2 : Consider the following graph.

Does this graph represent a function?

3 : Consider the following graph.

Does this graph represent a function?

4 : Consider the following graph.

Does this graph represent a function?

5 : Consider the following graph.

Does this graph represent a function?

6 : Consider the following graph.

Does this graph represent a function?