we can easily reveal the influence of incorporating a lot more of a variable resource, say labor, to a fixed degree of money and find out what comes about to output. For demonstration applications in economics, we often https://www.youtube.com/watch?v=-nQTR6bXhfU&list=PLZ3DkIWtVYetfvXsAvY04--yisQJg2WWI&index=9&pp=iAQB