1. The problem statement, all variables and given/known data if a value has a variables that cancel out can it be considered a constant? looking to make an equation out of proportionality statements 2. Relevant equations this is the equation that we are supposed to get: f=√((F)/(4∏2mr)) the 3 proportionality where f2=kF , f= k(1/m) and f= k(1/r) 3. The attempt at a solution i have reached here : f2= k(F/m2r2) k being a constant, can its value be : k= (mr)/(4∏2) so that the values cancel out giving you the required equation? and would it still be considered a constant?