The equation x + 4 = y can be rewritten as the function f(x) = x + 4 and the equation 2x + 2 = y can be rewritten as the function g(x) = 2x + 2. Complete the table of values for each function.
x | f(x) | g(x)
----------------
0 | 4 | 2
1 | | 4
2 | 6 |
3 | | 8
when x = ___ , both functions have an output of ___ .