Answer:
Bottom Right Option
Explanation:
Hello!
We can quickly determine if a graph is not a function by seeing if any points are stacked vertically.
In the other three options, we can see that there is one set of points that are stacked vertically. This is not a function, as one x-value can only have one unique y-value.
The bottom right option has no points stacked vertically, therefore it is a function.