The graph f(x)= √x is sketched in red and the graph of g(x) is sketched in green. use the translation rule and f(x)= √x to identify the function g(x).

The graphs of the functions can be transformed, obtaining related functions.
 We consider the following transformation:
 It is assumed that c is a positive constant, ie c> 0 and y = f (x) then:
 y = f (x) - c moves the graph c units down.
 For this case:
 g (x) = √x - 5
 
 the function g (x) is:
 g (x) = √x - 5

I'm sure the answer is a