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f(x) = 2 * 2 - x + 9 f(-4) = 2 * 2 -(-4) + 9 f(-4) = 4 + 4 + 9 = 17
It is f(x) = 4*3^x.
No, f(x) is not the inverse of f(x).
if f(x) = 4x, then the inverse function g(x) = x/4
When x = 7, f(x) = 3*(4-x) = 3*(-3) = -9