1. The problem statement, all variables and given/known data How do you calculate the mass from slope of a line T^2 on y axis and 1/f on x axis?? 2. Relevant equations 4π^2mr/fc 3. The attempt at a solution I don't know how to attempt this. I have a data table and the graph has y=0.7385x-0.0254. Obviously 0.7385 is the slope but I do not know what to use to get the mass.