state robert boyiles low and  his mathematical representation
 

Kindly correct your question. It is Boyle's law.
Kindly refer to the following link:
 
https://www.meritnation.com/ask-answer/question/can-you-please-explain-boyles-law-charles-law-in-a-simlif/states-of-matter/5913182
https://www.meritnation.com/ask-answer/question/state-and-explain-boyles-law-how-is-law-verified-graphica/chemistry/7089735