1. The problem statement, all variables and given/known data Using the smooth curve for V vs. I and find values for R for the seven values of V and I. 2. Relevant equations P = VI R ≠ V/I 3. The attempt at a solution I got the slope of the tangent line and got .002Ω for each point... Doesn't seem like a correct value. Can someone tell me how to get R. It is hinted something about the tangent line. I can't use the formula R = V/I for some reason stated on the paper.