The upward slope of the supply curve reflects the

a. principle of specialization in production.

b. principle of diminishing marginal productivity

c. fact that price and quantity supplied are inversely related.

d. law of increasing substitution.

b. principle of diminishing marginal productivity

Explanation:

c) The relationship for the supply curve between price and quantity is directly related. Suppliers are more willing to produce at higher prices.

d) substitution effect will generate shift in the supply curve as other products chane their price not the slope.

a) specialization will increase efficiency has no relationshp with prices.

b) as each unit added generates a lower amount of retunr (ceteris paribus) The price must go up to represent the marginal cost