As the potential across the resistor increased, the current through the resistor increased. If the change in current is proportional to the potential difference, the data should be in a straight line and the y-intercept should be zero. In the two resistor examples how close is the y-intercept to zero? Is there a proportional relationship between potential difference and current? If so, write the equation for each resistor data set in the form V = mI. Use a numerical value for the proportionality constant, m.

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