So let's examine the graphs of Boyle's Law or a graph of Boyle's Law. Now, we can have two graphs. We can graph volume and pressure. Or we can grab volume and one over pressure. So let's graph this guy first. So recall that I said that volume is inversely proportional to one over P. Now mathematically what that means is we have this type of a graph in which as we increase our volume, our pressure decreases.