Answer:

Explanation:
We know that,

Given,
Distance = 500 miles,
Time = 8 hours
Thus, the speed =

Since, the train continues to travel at a constant rate,
⇒ The Distance it will cover in 1 hour = 62.5 miles,
⇒ The distance it will cover in x hours = 62.5x
Let y represents the distance cover by train in x hours,

Which is the required equation.