Answer
slope=1
Work Step by Step
Slope is defined as:
$\displaystyle slope=\frac{rise}{run}$
To find the slope of $EF$, we need to find the rise and run from $E$ to $F$. From the graph, we see that:
$rise=3$ units
$run=3$ units
Thus:
$slope=\frac{3}{3}=1$
