A position versus time graph is shown: A Position versus Time graph is shown with y-axis labeled position in centimeters up to 15 and x-axis labeled time in seconds up to 10. A straight line connects the points 0, 0 and 3, 3. A horizontal line connects points 3, 3 and 6, 3. A straight line connects 6, 3 and 10, 11.

Which statement accurately describes the motion of the object in the graph above?

It moved from 3 cm to 10 cm at a constant speed of 2 cm/s.
It moved from 0 cm to 6 cm at an average speed of 1 cm/s.
It moved from 0 cm to 10 cm at an average speed of 2 cm/s.
It moved from 3 cm to 6 cm at a constant speed of 3 cm/s.