Final answer:
The bouncing of a trailer on a highway indicates that the trailer is more likely to be heavily loaded than nearly empty.
Step-by-step explanation:
The bouncing of a trailer on a highway indicates that the trailer is more likely to be heavily loaded than nearly empty. This is because the bouncing motion is caused by the trailer's suspension system responding to the weight of the cargo. When the cargo in a trailer is heavy, it exerts a greater downward force on the suspension system, causing the trailer to bounce up and down.
On the other hand, if the trailer is nearly empty, there would be less weight on the suspension system, resulting in less bouncing. Therefore, a heavily loaded trailer is more likely to be the cause of the observed bouncing motion.