evaluating functions without x?

Question

For example it says

 

 

f(x) = 2,     x≥3

 

 

a. find f(4)

 

anyone know how i do this when there's no X?

 

all the other ones have X in it

Answer 1

f(x) = 2 is a constant function, meaning that it has a value of 2 for every x ≥ 3.  Since 4 ≥ 3, f(4) = 2.  Also f(5) = 2, f(6) = 2, f(7) = 2, etc.