1. The problem asks to find the inverse function value $f^{-1}(-10)$ given that $f(x)$ is invertible. 2. By definition, $f^{-1}(y)$ gives the $x$ such that $f(x) = y$. 3. Here, we want $x$ such that $f(x) = -10$. 4. From the graph description, the point where $f(x) = -10$ corresponds to $x \approx 1$. 5. Therefore, $f^{-1}(-10) = 1$. 6. This means the inverse function evaluated at $-10$ is $1$. Final answer: $$f^{-1}(-10) = 1$$