Question: reverting axis in Maple

Is there any way to reverse an axis in the plot command? I solved the baristochrone problem as 
a school project,but I did it using an upside-down Y axis. Of course, when I try to make a graph with
my solution, I'm getting a regular cycloid instead of an inverted one, since I was using a 
reverted Y axis when solving the problem. 

Help would be very appreciated as I couldn,t find anything on the subject.
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