Your graph is attached. Any of a number of graphing utilities will do this for you. My favorite is desmos[dot]com.
If you want to graph it by hand, it is convenient to put this into intercept form by dividing by 6.
... x/(-2) + y/(-6) = 1
This tells you the x-intercept is -2 and the y-intercept is -6. Plot those two points and draw your line through them.
