#### Answer

slope=-1

#### Work Step by Step

Slope is defined as:
$\displaystyle slope=\frac{rise}{run}$
To find the slope of $AF$ (if they were connected), we need to find the rise and run from $A$ to $F$. From the graph, we see that:
$rise=-3$ units
$run=3$ units
Thus:
$slope=\frac{-3}{3}=-1$