can you show it step by step?
First, Plot a few points by making an x and y table. You take your equation and plug in a few values for x, like 1, 4,9 you want to plug in perfect roots or you will get decimals. If your equation is a bit more complicated, and after plugin in the perfect roots you still get decimals, its okay, no big deal. The results for every X value you plug in becomes your Y value or output. Then just plot.