Freundlich adsorption isotherm is given by the expression $\frac{\mathrm{x}}{\mathrm{m}}={\mathrm{kp}}^{\frac{1}{\mathrm{n}}}$. Then the slope of the line in the following plot is

Freundlich equation or Freundlich adsorption isotherm, an adsorption isotherm, gave an empirical relationship between the quantity of gas adsorbed by unit mass of solid adsorbent and pressure at a particular temperature.

$\log \frac{\mathrm{x}}{\mathrm{m}}= \log \mathrm{k}+\frac{1}{\mathrm{n}}\log \mathrm{p}$