Unlmited Homework Help for $1 and win iPhone 13
The graph of the given function is
Horizontal line test:
If any horizontal line intersects the graph, not more than once, then the graph represents a one-to-one function.
Draw the horizontal line onto the given graph as shown below
In the above graph, the horizontal line intersects the graph at two points.
Hence, the given function is not one-to-one.