I'm doing packed bed adsorption experiments and want to calculate parameters of

Bed depth service time model. The model equation is t=(No*Z/Co*u)−(1/CoKa)ln(Co/Ct−1). where t is the service time (min) at breakthrough time, u represents the linear flow velocity (cm/min), No (mg/L) depicts the adsorption capacity of the bed and Ka (L/mg min) represents. From the linear plot of Z Vs T, I received the equation y=4x-9.333. Now I want to calculate No (mg/L) and Ka (L/mg min).

Please advise

Thank you