Originally Posted by
CheGiantForLife
Yea, that's not the point.
Maybe a picture will help you understand.
Are these all equally difficult to ride?
You asked about hills vs. flat, but those are radically different wave patterns, none of which are flat.
You don't get that those wave patterns would be very different riding situations? Also, since there's no scale on the y and x axes, we have no idea what the grades are.