What if the production possibilities curve is a straight line in microeconomics?

If the production possibilities curve (PPC) is a straight line, it indicates that the opportunity cost of producing one good over another is constant. This suggests that resources are perfectly substitutable between the two goods, meaning that the same amount of resources can be transferred between their production without any loss of efficiency. This situation is relatively rare in real-world economies, where resources typically have varying efficiencies in producing different goods. A straight-line PPC may imply a simplified model of production, often used for theoretical analysis.