Question 19The line segment formed by $A(1, 2)$ and $B(3, 3)$ is rotated to the line segment formed by $A'(3, 1)$ and $B'(4, 3)$ about the point $P(r, s).$ What is $|r - s|?$$\dfrac{1}{4}$$\dfrac{1}{2}$$\dfrac{3}{4}$$\dfrac{2}{3}$$1$