Boyle's law states that pressure of given mass of an ideal gas is inversely proportional to its volume at a constant temperature. For jdeal gas, pV=nRT where, T= constant. pV=k ...(i) For Eq. (i), i.c. xy=c2 (i.e. hyperbola) p=kT ...(ii) i.e. y=mx (i.e. straight line) For Eq. (ii),