A line segment has a left endpoint, L, and a right endpoint, C.

A line has a left plotted point, M, and a center plotted point, R.
A line has a left plotted point, K, and a right plotted point, E.
A ray has a left endpoint, O, and a plotted point to the right, D.

What is the total number of endpoints and plotted points?

Answer: 8 (4 endpoints and 4 plotted points)