The graph illustrates the way current $I$ depends on voltage $V$ for a filament lamp. Because the graph is not a straight line, the lamp's resistance changes with $V$. Which row gives the correct resistance for the stated value of $V$?
- A$V = 2.0\,\text{V}$, $R = 1.5\,\Omega$
- B$V = 4.0\,\text{V}$, $R = 3.2\,\Omega$
- C$V = 6.0\,\text{V}$, $R = 1.9\,\Omega$
- D$V = 8.0\,\text{V}$, $R = 0.9\,\Omega$