Answer
See the image below.
Blue graph stands for the inverse of the graph provided.
Work Step by Step
According to the definition of inverse function, it has a graph which is sketched by reflecting a function about $y=x$ axis, so we simply have to reflect the graph provided about $y=x$ axis.
We will get the blue graph provided in the image above. Note, between the points $2$ and $3$ the graph lays on $y=x$ axis, so it will stay at the same position.