Final answer:
When driving a vehicle with a light-to-medium trailer attached, a bouncing trailer is more likely to indicate a heavily loaded trailer rather than a nearly empty one.
Step-by-step explanation:
When driving a vehicle with a light-to-medium trailer attached, it is important to consider the weight of the trailer. If the trailer is heavily loaded, it is more likely to bounce up and down slowly as you drive. This is because the weight of the cargo in the trailer affects the suspension system, causing it to compress and extend, resulting in the bouncing motion.
In contrast, if the trailer is nearly empty, there is less weight to cause the suspension system to compress and extend, so the trailer is less likely to bounce.
Therefore, based on the observation of a bouncing trailer, it is more likely that the trailer is heavily loaded rather than nearly empty.