The graph of g(x) is the graph of f(X) = x + 6 reflected across the x-axis. Which equation describes g?
g(x)= - x + 6
g(x)= - 6x - 6
g(x)= -x - 6
g(x)= x - 6
g(x)= - x + 6
g(x)= - 6x - 6
g(x)= -x - 6
g(x)= x - 6