Like I said, the best way to start is to make it a lot easier on yourself and solve so that your function has y by itself. y=
so y=2-2x or y=-2x+2 <-- this one is in perfect form of Y=mx+b
Since b=2 you know it's going to intersect the y-axis at the point (0,2) and then you use the slope m=-2/1 so you move 2 on the y-axis and then 1 on the x-axis
The graph looks like this:
Most important, do you understand what I did?