1. The problem statement, all variables and given/known data The resistance for a wire with cross-sectional radius r is given by R = k/(r^2). Convert this equation to a straight line for which k can be determined from the slope. 2. Relevant equations Equation of a line is: y = mx + c 3. The attempt at a solution R = k/(r^2) ln(R) = ln(k/(r^2)) ln(R) = ln(k) - ln(r^2) ln(R) = ln(k) - 2*ln(r) I'm not sure how to linearize this equation, this is where I get stuck. ln(R) would represent y on the graph. k ought to equal the slope, but I can't see how to do that.