As a branch of operations research, queuing theory can help inform business decisions on how to build more efficient and cost-effective workflow systems. Queuing theory is the study of the movement of people, objects, or information through a line.
If we use similar triangles ( as shown in the attachment ) we will see that the line CM is also 1/4 *( yC-yD)= 1/4*(2+2) = 1/4*4 =1 Answer: y-value of that point is A) y=1.