The V-I graph of conductor A passes through (0.5 A, 3 V), and that of conductor B through (0.5 A, 7…

Step 1. The resistances. A: $\dfrac{3\ \text{V}}{0.5\ \text{A}} = 6\ \Omega$. B: $\dfrac{7\ \text{V}}{0.5\ \text{A}} = 14\ \Omega$.

Step 2. The voltages. A: $1.2\ \text{A} \times 6\ \Omega = 7.2\ \text{V}$. B: $1.2\ \text{A} \times 14\ \Omega = 16.8\ \text{V}$.