Answer:
C.
Step-by-step explanation:
Given:
A vertical line test can be used to determine if a graphed relation is a function.
If vertical lines are drawn on the given graph, we'll notice that each vertical line will only cross the graph at exactly one point, this shows that there is exactly one y-value for each x-value, which makes the graphed relation a function.
The domain of a graph is the set of all possible x-values from left to right. Looking at the given graph, we can see that the domain of the graph is from negative infinity to positive infinity except x = 2. So the domain of the graph is a set of all real numbers excluding x = 2