So if I produce 100 units right over here, then my cost goes up to 1,300. 1,300. If I produce more than that, you see my costs increase and they increase at an ever faster rate. Now, I go into a lot more depth on things like cost functions in the economics playlist. But what I wanna think about in the calculus context is what would the derivative of this represent? What would the derivative of C with respect to Q, which could be also written as C prime of Q, what does that represent? Well, if we think about it visually, we know that we can think about the derivative as the slope of the tangent line.