And so this equation is the equation that describes activity the rate of that enzyme at the beginning of that chemical reaction. And notice what this equation actually looks like. So based on the curve here, we see that at the beginning of the reaction, the curve. So from about this point in time to, let's say about this point in time, the curve looks like a straight line. And in fact, this equation also describes an equation that looks like a straight line. So remember, a straight line has the following general form.