Answer:
It is NOT a function.
Step-by-step explanation:
By definition, the graoh of an equation represents y as a function of x if and only if no vertical line intersects the graph more than once. This is referred to as the "Vertical Line Test."
If you look at the attached image below, I've drawn a vertical line over your graph. It shows that the vertical line intersects twice (as shown by the 2 blue dots). What this means is that the given x value has 2 corresponding y-values. The vertical line represents the x, and the 2 blue dots are its corresponding y-values.
