In other words, slope gives the rate of change in y with repect to x. The concept of slope is referred to often in the core economics course. Check this for yourself.
Marginal revenue is the change in the total revenue for selling one more unit.
If we currently produce Q units, the marginal cost and marginal revenue of adding new units is given by the following equations where is the change in units . Therefore, the marginal cost of producing one more unit if we are currently producing 10 units is 53. Calculus allows us to determine marginal changes in the dependent variable given an infinitessimally small change in the independent variable. We can find as approaches zero. So far, we have defined slope in terms of two points.