Any help is appreciated, thanks. 1. The problem statement, all variables and given/known data In my course of differentials equations we were given the task to model a real life system with them, we choosed something that resembles a pendulum. 2. Relevant equations 3. The attempt at a solution We went to the lab and got experimental data from our system and the resulting data plot looks like a decaying exponential, but using an exponential as our rate of change results in a very complicated system of equations and I was wondering if there exists any other function that exhibits the same behavior or give up and use a linear approximation.