Question

(a) what is the shape of the graph obtained by plotting potential difference applied across a condutor against the current flowing through it? (b) what does the slop of this v_ I graph at any point represent

Answer 1

a straight line is the graph between V and I and slope represents resistance = V/I

Answer 2

Hey mate !!!
The shape of the line is straight between the applied potential & current flowing through it becoz the applied potential is directly proportional to the current flowing through the conductor. The graph has a constant slope.
Slope at each point represents the resistance.