Collinear points

On the screen, we see nine points A, B, C, D, E, F, G, H and I. Line AB is drawn in black color. When any point other than A and B is present on this line then that point is said to be collinear with points A and B. Let us move these points and place them on the line so that they become collinear.
1. What do you observe when points other than A & B are placed on the line AB?