Final answer:
The distance traveled for each hour, based on the linear equation d=50t, is 50 miles.
Step-by-step explanation:
The question deals with the proportional relationship between distance traveled and time when an object is moving at a constant speed. The linear equation given is d = 50t, which represents this relationship, where 'd' stands for distance in miles and 't' stands for time in hours. According to this equation, for every hour (t = 1), the distance traveled (d) would be 50 miles, since d equals 50 times t. Therefore, the answer is 50 miles (option B) traveled for each hour.