I just can't understand how this makes sense. Why does f(x-vt) represent a transverse wave along +x? Where v is the velocity, t is time, and x is position along the x axis. It seems to be exactly the opposite to what I would think makes sense, with f(x+vt) representing a wave along +x and f(x-vt) representing a wave along -x. But this isn't the case! I've been trying to wrap my head around it, not matter how I look at it. Can anyone explain this concept in a way that makes sense? Thanks!