we can easily exhibit the effect of including far more of the variable resource, say labor, to a fixed amount of money and see what comes about to output. For demonstration applications in economics, we often make https://www.youtube.com/watch?v=-nQTR6bXhfU&list=PLZ3DkIWtVYetfvXsAvY04--yisQJg2WWI&index=9&pp=iAQB