What is "if f(x) = + 8?

It seems like the information provided is incomplete. The statement "if f(x) = + 8" does not provide enough context to fully understand the given function. In order to provide more information about the function f(x), it would be helpful to know the entire equation or function that f(x) represents. Without more information, it is not possible to analyze or deduce any specific properties or characteristics of the function.