The Mirror formula is:

Mirror formula is $\frac{\text{1}}{\text{f}}=\frac{\text{1}}{\text{u}}+\frac{\text{1}}{\text{v}}$ 

The magnification formula is $\text{m}=\frac{\text{height}\text{of}\text{the}\text{image}}{\text{height}\text{of}\text{the}\text{object}}=\frac{\text{O}}{\text{I}}$

$\text{m}=\frac{\text{I}}{\text{O}}$