What is the rate of conversion of one product into another along the Production Possibility Frontier called?

The collection of all possible combinations of goods and services that can be produced from a given amount of resources and a given stock of technological knowledge is called the:

The Production Possibilities Frontier (PPF) illustrates concepts of scarcity and choice. Analyze the following statements about the PPF: 1. A movement from a point inside the PPF to a point on the PPF represents transition to full employment of existing resources, but not economic growth itself. 2. An outward shift of the PPF represents Economic Growth, caused by an increase in the quantity or quality of factors of production. 3. The typical shape of the PPF is concave because of the Law of Diminishing Marginal Utility. Which of the above statements are correct?