How Do I find log (y) equation

Mathematically, log ₓ (y) is the number to which you raise 'x' in order to get 'y'.

Since logarithm to base 10 (that is, x = 10) is the common logarithm,

log (y) is same as log ₁₀ (y).

Therefore, log (y) is the number to which you raise 10 in order to get 'y'.