The rules of translations are shown below:
Consider a function f(x):
0. f(x) + a is f(x) shifted vertically a units up
,1. f(x) - a is f(x) shifted vertically a units down
,2. f(x+a) is f(x) shifted horizontally a units left
,3. f(x-a) is f(x) shifted horizontally a units right
Now,
f(x + 4) is basically f(x) translated "4" units to the left
