The correct representation of the domain and range of the function \( y = \tan x \) is:
Domain: \( x \in (-\infty, \infty) \) except for \( x = \frac{\pi}{2} + n\pi \), where \( n \) is an integer.
Range: \( y \in (-\infty, \infty) \)
So the most appropriate option is:
domain: \( x \in (-\infty, \infty) \), \( x \neq \frac{\pi}{2} + n\pi \), \( n \) is an integer
range: \( y \in (-\infty, \infty) \)