1. The problem statement, all variables and given/known data Hello. The resistance of a wire increases when the temperature increases. How would this cause the shape of the graph to change? Explain why. The graph shown is a straight line graph with the line travelling at 45 degrees path. The x-axis is VOLTS. The y-axis is CURRENT 2. Relevant equations This is High School Physics and the chapter in the book is talking about Ohms law and V=IR 3. The attempt at a solution In my opinion the gradient of the line should decrease. V = IR So V is directly proportional to R. So as R increases V will increase too. But I is indirectly proportional to R. So as R increases I will decrease. So with V getting larger and I decreasing the slope will be shallower. Maybe even a downward curve. The book answer says: "The current would rise ever more slowly as the potential difference increased. This is because increasing the current makes the wire hotter, increasing the resistance". The BOOK ANSWER makes no sense to me. it doesn't even mention the slope of the graph. Please advise. Thank you.