Question

How could resistance be calculated in graph.

Answer 1

It can be calculated from the potential difference across a component and the current flowing through it. The total ... Resistors, filament lamps and diodes produce different current-potential difference graphs.

Answer 2

By having the values of V and I
mark them on the graph...
V on the y-axis...
I on the x-axis...
Then after plotting join them and calculate the resistance of the given series is noticed...