(e) f(x+k) Find the following values for the function f(x) = 3x - 4. (a) f(-x) (b) - f(x) (c) f(x - 2) (d) f(3x) (a) f(-x) = (Simplify your answer.) (b) -f(x)=(Simplify your answer.) (c) f(x-2)=(Simplify your answer.) (d) f(3x)=(Simplify your answer.) (e) f(x+ k) = (Simplify your answer.)