And notice that this equation has the same form as y equals MX plus b. This is our general equation for a line. And that means if we plot this guy, we will get a line. So this is our y number, this is our Y intercept, this is our x value and this is our slope. Our slope is negative k. So if we plot this where our Y is the concentration of X and our X is the time or the progress of reaction, we get the following negative slope where this point is the .0
comma concentration of initial because it's time to zero, we plug in t zero and we get simply this guy equals this guy. That's exactly what this guy is.