What is Log Base 4 of 16?

The below is the work with steps to find what is log base 4 of 16 shows how the input values are being used in the log base 4 functions. Formula:
log_b(x) = y, if b^y = x

Input:
x = 16
b = 4

Solution:
y = log₄ 16
= log₄ 4²
= 2 log₄ 4 = 2 x 1
log₄ 16 = 2
log₄(16) = 2