Effect of Pressure (Freundlich Adsorption isotherm) and Temperature

Freundlich adsorption isotherm is

Freundlich adsorption isotherm is applicable at:

The equation for Freundlich adsorption isotherm is

Write Freundlich adsorption isotherm equation at low pressure.

Which of the following statements are correct with respect to adsorption of gases on a solid ? (i) The ectent of adsorption is equal to KP^(n) according to Freundlich isotherm. (ii) The extent of adsorption is equal to KP^(1//n) according to Frendlich isotherm. (iii) The extent of adsorption is equal to (1+bP)/aP according to Langmuir isotherm. (iv) The extent of adsorption is equal to aP/(1+bP) according to Langmuir isotherm. (v) Freundlich adsorption isotherm fails at low temperature.

What is the slope of freundlich adsorption isotherm ?