You can
put this solution on YOUR website!This is difficult to show you online, if you have questions about something I was unclear about let me know.
You said you knew how to plot points. If you were to connect the dots you'd get a line that looks like this:

A parallel line going through the origin, would have the same slope or slant. Graphically you could find the slope by counting the units up or down/units left or right.
Algebraically, we have a formula for slope (m):

Our second line would start at (0,0) and go up 3 units and right 4 units to (4,3), where you'd plot another point connect the dots and you have:

Together the two lines look like this: