Answer
The given graph fails the Horizontal Line Test, so it is not a one-to-one function.
Work Step by Step
The Horizontal Line Test states that when all the horizontal lines intersect the function graph at no more than one point, then the function is said to be one-to-one.
Since the graph is a horizontal line, a horizontal line will cross it in multiple points. Thus, it fails the Horizontal Line Test and is not a one-to-one function.
