Quadratic Functions: Determine the value of b

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I'm having trouble with this question and I'm not sure what to do. Would appreciate any one who helps me out.

Question: The point $(-2,1)$ is on the graph of the quadratic function: $f(x) = -x^2 + bx + 11$. Determine the value of $b$.

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Hint: If $(p,q)$ is on the graph of $y = g(x)$, then we know that $q = g(p)$. So just replace $x$ with $-2$ and replace $f(x)$ with $1$, then solve for $b$.