So notice initially we have a relatively linear relationship between the concentration and the velocity. So initially, as we increase the concentration, our rate or velocity also increases pretty much linearly. Now eventually we reach this point here and this point basically represents something known as Km. And Km is basically a constant known as the Michaelis constant. Now, the mechaelis constant basically represents the concentration of the substrate that basically makes sure that exactly half of the active sites are completely filled for that particular enzyme. And at this point, our velocity is given by v one half.