According to the given data we have the following:
equation of the line that passes through the points (-3,-2) and (-9,-4)
equation of a line is y=mx +b
First we need to find the slope as follows:
slope=(y2-y1)/(x2-x1)
plug (-3,-2) and (-9,-4) at the slope
So, slope=(-4+2)/(-9+3)
slope=-2/-6=1/3
Next, we would plug (-9,-4) at the equation of the line, so:
-4=1/3(-9) +b
-4=-3 +b
b=-1
Therefore y=1/3x -1