Graph it as any other graph: use the graph paper, a pensile and a straightedge.
For this straight line, fill a table of values of two points;
Mark the points at the graph paper and connect them drawing the only one straight line.
It is how people do it and did it just thousands years.
If you want to use more modern tools, you may plot such graphs electronically.
For it, you may use the site www.desmos.com,
which has free of charge plotting tool, and everyone may use it at no fees,
so you can easily plot your graph on your own.
All you need is to input the equation of the line into the designated window.
Finally, you can make such simple plot using your graphing calculator.
On how to do it, you may learn from the Internet: see this video-lesson
