Which of the following is NOT related to the slope of isoquants?

A) The fact that inputs have positive marginal product
B) The fact that inputs have diminishing marginal product
C) The fact that input prices are positive
D) The fact that more of either input increases output
E) The fact that there are diminishing returns to inputs

Marginal Product

The increase in output resulting from a one-unit increase in the quantity of a particular input, holding other inputs constant.

Isoquants

Isoquants are curves that represent combinations of various inputs that produce the same level of output, used in production theory to analyze input choices.

Input Prices

The cost of resources used in the production of goods and services.