In order to find the slope we need to find two points on the line.
From the above graph we can see that the points (-4,-1) and (0, -3) lie on the line. So using these two points we can find the slope.
[tex]Slope=m= \frac{-3-(-1)}{0-(-4)} \\ \\
m= \frac{-3+1}{0+4} \\ \\
m= \frac{-2}{4} \\ \\
m= \frac{-1}{2} [/tex]
So, first option is the correct answer