B. The resistance R of the circuit is determined as 2.0 ohms.
What is ohm's law?
Ohm's Law states that the current flowing in a circuit is directly proportional to the applied potential difference and inversely proportional to the resistance.
V = IR
R = V/I
The slope of the given graph is the resistance of the circuit.
Choosing point (0 A, 0 V) and (4.5 A, 9 V)
R = ΔV/ΔI
R = (9 - 0 ) / (4.5 - 0)
R = 9/4.5
R = 2.0 ohms
Thus, the resistance R of the circuit is determined as 2.0 ohms.
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