Ainsley lives in a town 360 miles directly north of orlando, and one saturday, she takes the train from her town to the city. he train travels at a constant speed, and after 2.5 hours, she sees a sign that states "orlando: 210 miles". what is an equation that represents (x), the distance ainsley is from orlando after x hours.

By definition we have to:
 d = v * t
 where,
 d: distance
 v: speed
 t: time
 We have then that the speed is:
 (360-210) = v * 2.5
 Clearing we have:
 v = (360-210) /2.5
 v = 60 mph
 We now write the generic equation of distance:
 d (x) = 60x
 Where,
 x: time
 
 an equation that represents (x), the distance Ainsley is from Orlando after x hours is:
 d (x) = 60x

The answer would be 13.5 minutes.