Rearrange so you get then make equal a number of your choice. Say, . Then you have half of the coordinates for a point on that linear function; a point on that line. The other half of the coordinate would be what becomes when you replace with the coordinate you chose.

In this case and since then . Your coordinates are in that case . Once you repeat this process with another value for , you get two points on this line. To draw the graph, just draw a line through the two points (and onwards).

Hope I could be of assistance.