A central concept in Economics is that of opportunity cost. This means if we do one thing, we cannot do another without losing something in the process. Choices have to be made by consumers, businesses and governments because of scarcity. For example, over six million people travel into London each day and they make choices about when to travel, whether to use the bus, the tube, to walk or cycle – or whether to work from home. A Production Possibility Frontier is a curve or a boundary used to show opportunity cost between two or more goods and services that can be produce. It represents the economic concept of choices and opportunity cost as it shows allocation of resources within an economy:
The diagram shows that an economy is productively efficient at point A, B and C but an economy is not productively in point X since resources are not being used efficiently in the production of both goods. Point Y represents the goals that the economy cannot