Study the graph of an object’s motion.
Which statement identifies when the object changes direction and why?

The object changes direction at 5 s because the velocity changes from a positive to a negative value.

The object changes direction from 2 s to 9 s because the slope is negative the entire time.

The object changes direction at 2 s because the slope changes from positive to negative.

The object never changes direction because a velocity-time graph does not communicate the direction in which an object moves.