1. The problem statement, all variables and given/known data Excel data for an assignment I'm doing has spit out a curve from some experimental data as shown here: http://i.imgur.com/KcJyEEj.png I'm wondering if there's a nice way to put this as a transfer function in the form of Y/X or something similar 2. Relevant equations 3. The attempt at a solution Simply using algebra seemed to not work to be able to get y/x, unless I'm missing something obvious. I figured maybe if I used laplace transforms I could get a situation where Y/X would appear. Not sure how to go about this as it's pretty different from the differential equations laplace is normally used on. Any idea?