Diagram of two graphs. The graph on the left is called Charles's Law. The graph on the right is called Boyle's Law. Charles's Law graph has a horizontal axis for temperature and a vertical axis for volume. It shows a dotted line starting at the left bottom corner of the graph and gradually increasing to the end of the graph Boyle's Law graph has a horizontal axis for volume and a vertical axis for pressure. The line starts at the top of the graph and gradually curves downward.