We locate the point(-4,-2)



Then we consider the slope to be ,
with the numerator negative and the denominator
positive.

The numerator of the slope, -2, is the vertical change. So we
draw a line downward 2 units (downward because
it's negative)



The denominator of the slope, 3, is the horizontal change. So we
draw a line to the right 3 units (rightward because
it's positive)



Now we just draw a line across the two ends of that 
L-shaped thingy, and that's it:



Edwin