The objective is to convert to an equation that can be plotted as a straight
line.
The variables to plot are 1/q versus 1/C to get a straight line.

Where q is the fractional occupancy of the adsorption sites
C is the concentration, but P for pressure is often used for situations involving adsorption of a gas.
Ka and Kd are rate constants related to rates of adsorption and desorption from the surface area.