1. The problem statement, all variables and given/known data Hello everyone, I'm in need of some assistance in regards to deriving an equation from a graph. I have been tasked to graph information which I've collected through experimentation and then write an equation to represent the graph. I'm stuck at steps 3 and 4 and I am not really sure on how to approach the questions. I know that I have a power graph and if I square the frequencies that I obtained I come to a linear graph. Here is a direct link to the graphs that I've made: http://s7.photobucket.com/albums/y266/murdoc8888888/?action=view¤t=hmwrk2.jpg 2. Relevant equations [itex]Fc=(mv^2)/r[/itex] [itex]f= 1 / T [/itex] 3. The attempt at a solution I'm not exactly sure on how to derive an equation from curved graph at all, the linear graph though is simple. (Y2 - Y1) / (X2 - X1) is the equation to find slope and from there I would use 'y' intercept form and derive that equation. I don't know how to do this with a power graph though.