SOLUTION: The distance of a train from a station, d, varies directly with the time, t. If d = 200 miles when t = 4 hours, what is the equation of direct variation?

Question 187635: The distance of a train from a station, d, varies directly with the time, t. If d = 200 miles when t = 4 hours, what is the equation of direct variation?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
The distance of a train from a station, d, varies directly with the time, t. If d = 200 miles when t = 4 hours, what is the equation of direct variation?
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d = rt is often used, distance = rate x time
if 200 = r*4, then r = 50 miles per hour, or 50 mph
d = 50t is the equation.
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