# Is {(1, 2); (2, 3); (3, 4); (4, 5)} a function?

##### 1 Answer

Jul 18, 2018

Yes

#### Explanation:

We see that

We can even graph this:

graph{y=x+1 [-10, 10, -5, 5]}

This passes the Vertical Line Test (VLT), as we can draw a vertical line anywhere in the graph, and it intersects the graph **once**.

This tells us we're dealing with a function here.

Hope this helps!