MRT or Marginal rate of transformation i.e. Slope of PPC/PPF

Ø Marginal rate of transformation:

The slope of the production–possibility frontier (PPF) at any given point is called the marginal rate of transformation (MRT). The slope defines the rate at which production of one good can be redirected (by reallocation of productive resources) into production of the other. It is also called the (marginal) "opportunity cost" of a commodity, that is, it is the opportunity cost of X in terms of Y at the margin. It measures how much of good Y is given up for one more unit of good X or vice versa. The shape of a PPF is commonly drawn as concave to the origin to represent increasing opportunity cost with increased output of a good. Thus, MRT increases in absolute size as one moves from the top left of the PPF to the bottom right of the PPF

Ø Explanation of PPC/PPF:

Economists also use the PPF model to illustrate two categories of goods, both consumer goods and capital goods. So here is what that PPF curve looks like. aaaEvery point along the curve is efficient; points outside the curve are unobtainable or inefficient.