And so in trial one, point number one is zero. Now, in trial two, we then add a certain amount of concentration of S, let's say this many S molecules, and then we measure that corresponding y value, that velocity of that enzyme. And so suppose we get the following value. And so this is data point number two, and now we add even more S concentration. And let's say we add this quantity and that corresponds to this data point here. And so we continue adding these data points.