1. Graphing Gas Behavior

2. Pressure increases as temperature increases

3. Temperature and Volume
As the temperature increases, the gas is warmed, therefore it will expand and increase in volume

4. When you graph Charles Law, the line will pass through the origin (0,0). When a graph of two variables passes through the origin, the variables are directly proportional.
As T  also V 
T  also V 
At constant pressure

5. When one variable increase the other variable increases

6. Pressure and Volume
The graph for Boyle’s law shows that the pressure of the gas varies inversely with its volume at constant pressure.
As V  then P 
V  then P 
At constant temp

7. When the line forms a curve, the two variables are said to be inversely proportional. This means when one variable goes up, the other goes down in a regular way.