Solve Tgis Question

Dear student,
(a)The slope of the VI graph gives the resistance.
(b)
 $$\begin{gathered} V = IR \\ or R=\frac{V}{I}=\frac{4-0}{1-0}=4\Omega \end{gathered}$$
(ii) 

(iii) The general rule is resistivity increases with increasing temperature in conductors and decreases with increasing temperature in insulators.
(iv) $P =\frac{V^2}{R}=\frac{{10}^2}{10}=10W$

Regards