Final answer:
The boat with a velocity of –14 miles per hour, with east as the positive direction, is moving west.
Step-by-step explanation:
If a boat is moving at a velocity of – 14 miles per hour and east is taken as the positive direction, the boat is moving in the opposite direction of the positive sign, which in this context is west. Therefore, the correct answer is:
D. It is moving west.
Since the question simply states the velocity of the boat without mentioning any changes in speed or deceleration, we only consider the direction of motion related to the given positive direction (east). The velocity is negative when considering east as positive, therefore the boat is traveling west.