1. The problem statement, all variables and given/known data A student is calculating the resistance of a piece of fuse wire. He takes 5 readings on the voltmeter and ammeter for different settings of a variable resistor. He decides that instead of measuring the gradient of the graph to calculate the resistance, it would be okay to use the formula R = V/I for each pair of measurements and then finding the mean. Question is : Why is calculating the gradient of the graph a better method? 2. Relevant equations V = IR 3. The attempt at a solution The graph method is better because we can see any outliers instantly i.e points on the graph that don't fit the line/curve so can be ignored (assumed to be errors). Is that an okay answer? Any other suggestions please. Thank you.