5.1 in text. Note instantaneous and average speed. In order to describe speed and direction, we have to be sure of our frame of reference. We describe position, velocity, etc. in a reference frame. Remember the train shooting the ball up.
All motion is relative to something.
We don't think there is an absolute frame of reference. Describe where I am with respect to you. It doesn't suffice to say 3 m. That would be on a circle of radius 3 m. You also have to give the direction. You could say 3 m south, or 3 m toward the computer.