The problem asks us to find the slope of line $\overline{AB}$ where the line has the symbol indicating that it is a horizontal line.

1. Problem Description

The problem asks us to find the slope of line $\overline{AB}$ where the line has the symbol indicating that it is a horizontal line.

2. Solution Steps

A horizontal line has a slope of zero. This is because the change in the y-coordinate is always zero. The slope $m$ is defined as the change in y divided by the change in x:

$m = \frac{\Delta y}{\Delta x}$

For a horizontal line, $\Delta y = 0$. Therefore, $m = \frac{0}{\Delta x} = 0$.

3. Final Answer

The slope of the line is 0.