1. The problem statement, all variables and given/known data What does the slope represent for a graph of force of electrostatic (y-axis) as a function of product of charge (x-axis)? -charges are not given - the experiment was done by charging 1 sphere, touching it with sphere two so that each sphere is 1/2 q. By touching sphere 1 with sphere 3, sphere 1 gets a charge of 1/4 while sphere 2 still has a charge of 1/2 (how charge was manipulated). These "coefficients" were graphed on the x-axis. my slope equals 8.57 x 10^-4 N/q^2, not sure what it represents 2. Relevant equations Fe=kq^2 / r^2 3. The attempt at a solution I set up the equation as: Fe = 8.57 x 10^-4 N/q^2 q1q2 = kq1q2/r^2 =8.57 x 10^-4 N/q^2=k/r^2 not sure how to end or if this is the right track at all. any suggestions/answers?