Question 18A point $P$ is randomly selected from the rectangular region with vertices $(0,0),$ $(2,0),$ $(2,1),$ $(0,1).$ What is the probability that $P$ is closer to the origin than it is to the point $(3,1)?$$\dfrac{1}{2}$$\dfrac{2}{3}$$\dfrac{3}{4}$$\dfrac{4}{5}$$1$