What is Log Base 2 of 128?

The below is the work with steps to find what is log base 2 of 128 shows how the input values are being used in the log base 2 functions. Formula:
log_b(x) = y, if b^y = x

Input:
x = 128
b = 2

Solution:
y = log₂ 128
= log₂ 2⁷
= 7 log₂ 2 = 7 x 1
log₂ 128 = 7
log₂(128) = 7