Rearrange r=v/i so that it is in the form y=mx+c

R= V/I

R is resistance

V is voltage

I is current

We can multiply by I both side

I*R = (V/I)*I

I will cancel out from right side

so IR = V

we can write it

V= IR

V= RI + 0

This equation is same as Y = MX +C

here Y is V

M is R which shows slope in a graph and it is constant

C is Y intercept but it will be zero because if potential difference is zero then current will also be zero

c, 1a hope this