So y, the Y coordinate is equal to and the slope multiplied by x the x coordinate plus b the y intercept. Now B in this particular case is zero. So this is zero and it cancels out. Now M is the slope that's v max divided by Km, x is a substrate concentration and Y is simply the velocity, the rate of that enzyme. So we see that this equation correctly describes the behavior of the enzyme at the beginning of that reaction. Not only that, but this equation also describes a reaction that has first order.