The values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are given below –

I (amperes)	0.5	1.0	2.0	3.0	4.0
V (volts)	1.6	3.4	6.7	10.2	13.2

Plot a graph between V and I and calculate the resistance of that resistor.

The VI characteristic of the given resistor is plotted in the following figure.

The slope of the line gives the value of resistance R is,

                                 $\mathrm{Slope}=\frac{1}{\mathrm{R}}=\frac{\mathrm{BC}}{\mathrm{AC}}=\frac{3-1}{10.2-3.4}=\frac{2}{6.8}$

                                                        $\Rightarrow \mathrm{R}=\frac{6.8}{2}$

                                                              $\mathrm{R} =3.4 \mathrm{\Omega }$

Therefore, the resistance of the resistor is $3.4 \mathrm{\Omega }$.