If $f(x)=-6 x+9$, find $f(3)$.
Final Answer: \(\boxed{-9}\).
Step 1 :The function \(f(x)\) is a linear function. When we substitute \(x=3\) into the function, we get \(f(3)=-6*3+9\).
Step 2 :After substituting \(x=3\) into the function, we get \(f(3)=-9\).
Step 3 :Final Answer: \(\boxed{-9}\).