Slopes

So today in algebra we started a new unit. First he gave us an input output table with some missing spots in the "y" column. We then had to solve for "y" and then plot the points on a graph. Then when you connect the dots it should make a slope. A slope is really just a straight line. Mr. S then gave us a Co-Planar. Its basically just the steps we go through.
1) Locate y-intercept. 2) Use slope. 3) Locate three points. 4) Connect the dots. Our problem was 3/5x -3. So you move three points down. Then you move five points to the right and left. Then from the spot after coordinates (0,-3) move three points down. Your new coordinate will be (0,-6). After that look for (0,-6) and (5,0) and make a mark where they intercept. When you conncet points (-5,0), (0,-3), and (5,-6) it will make a slop. Okay I know that sounds really confusing maybe but teaching is hard! I don't know how Mr. S can do it all day! So here you go:

So here's how it SHOULD look like. FYI: if a line points left (down), its a negative line. And then if iit points right (up), its a positive line.