1. The problem is to analyze the equation $x = -1$ and understand its graph. 2. This equation represents a vertical line where the $x$-coordinate is always $-1$, regardless of the value of $y$. 3. The graph of $x = -1$ is a vertical line crossing the $x$-axis at $-1$. 4. There is no $y$ term in the equation, so $y$ can be any real number. 5. Therefore, the line extends infinitely up and down along $x = -1$. Final answer: The graph is a vertical line at $x = -1$.