Question: Consider the quadratic function $f(x)$ shown in the graph. Solve the given equation below:
$f(x) = 1$
$x =$
Enter multiple solutions as a comma-separated list.
If no solution exists, enter "DNE".
1. **State the problem:** We need to find the values of $x$ such that $f(x) = 1$ for the given quadratic function.
2. **Understand the graph:** The parabola opens upward with vertex approximately at $(1, -5)$.
3. **Identify the points where $f(x) = 1$:** From the graph, the parabola intersects the horizontal line $y = 1$ at approximately $x = -1$ and $x = 3$.
4. **Write the solutions:** The solutions to the equation $f(x) = 1$ are $x = -1$ and $x = 3$.
5. **Final answer:**
$$x = -1, 3$$