Find the slope, if it exists. \( x=-5 \) Select the correct choice below and fill in any answer boxes within your choice. A. The slope is \( \square \). (Type an integer or a simplified fraction.) B. The slope is undefined.

In this case, the equation \( x = -5 \) represents a vertical line. Vertical lines have the same x-value for all points, meaning they do not change in the horizontal direction. Since slope is calculated as the change in y divided by the change in x, and the change in x is zero here, the slope is undefined. The correct choice is: B. The slope is undefined.