Vertical Line Test: Determining if a Linear Graph Represents a Function

Question

Does the graph below represent a function?

00:00 Is the given graph a function?

00:05 The definition of a function is that each X value has one Y value

00:10 Let's check the graph values in the table

00:15 We can see that each value has only one Y value, therefore it's a function

00:22 And this is the solution to the question

It is important to remember that a function is an equation that assigns to each value in domain $x$ only one value in range $y$ .

Since we can see that for every $x$ value found on the graph there is only one corresponding $y$ value, the graph is indeed a function.

Yes