The function \(f\) is defined by the given equation. If \(f(a) = -9a\…

The function

f

is defined by the given equation. If

f (a) = - 9 a

, where

a

is a constant, what is the value of

a

\frac{1}{3}

\frac{8}{27}

- \frac{8}{27}

- \frac{1}{3}

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