1. The problem states that $y = f(3) = 11$. This means when the input to the function $f$ is 3, the output $y$ is 11. 2. The question asks for the value of $y$ when $x=3$. 3. Since it is given directly that $f(3) = 11$, the value of $y$ is simply 11. 4. Therefore, the answer is: $$y = 11$$ This means the function outputs 11 at the input 3.