Question 114569
1) Let f(x) compute the time in hours to travel x miles at 58 miles per hour. 
2)What does f-1(x) compute? 
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f(x) = distance/rate  = x miles/58mph
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The domain of f(x) is "miles traveled"
The range of f(x) is "time required to travel that number of miles".
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f^-1(x) = rate*time = 58 mph*time = distance
f^-1(x) interchanges those:
The domain is time you travel
The range is miles you go in that time.
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Cheers,
Stan H.