Bonnie and Mike are working on a physics project. They need to determine the ohm rating (resistance in ohms) of a resistor. Electrical resistance, measured in ohms, is defined as potential difference, measured in volts, divided by current, measured in amperes (amps). In their project they set up the circuit at right. They vary the potential difference shown on the voltmeter and observe the corresponding readings of current measured on the amp meter.

a. Identify the independent and dependent variables.
b. Display the data on a graph.
c. Find the median-median line.
d. Bonnie and Mike reason that because 0 volts obviously yields 0 amps the line they really want is the median-median line translated to go through (0, 0). What is the equation of the line through the origin that is parallel to the median-median line?
e. How is the ohm rating Bonnie and Mike are trying to determine related to the line in 14d?
f. What is their best guess of the resistance to the nearest tenth of an ohm?

Resistor bltmeter measures the voltage ltage varied by changing size and number of batteries Ammeter measures the current Voltage12 10 6 431 Amps 28 214 1.00.6 0.2