Ohm's Law, ΔV = I • R, can be rewritten several ways. Which of the following is an incorrect way to rewrite Ohm's Law?

I = ΔV / R

R = ΔV / I

I / ΔV = R

1 / R= I / ΔV

I / ΔV = R

is V = I / R
but we all know V = I R