A country produces only apples and bananas. Moving from point A to point B along its production possibilities frontier, 5 apples are gained and 4 bananas are forgone. What is the opportunity cost of an apple?A. 4/5 of a bananaB. 1 appleC. 5/4 of a bananaD. 4 bananasE. none

A. 4/5 of a banana

Step-by-step explanation:

Given that a country produces only apples and bananas.

Moving from point A to point B along its production possibilities frontier, 5 apples are gained and 4 bananas are forgone

i.e. preferences for 5 apples are equal to 4 bananas

5 apples = 4 bananas

Let us calculate unit rate i.e. how much 1 apple is equivalent to.  this would give the opportunity cost, namely the cost of gain of 1 apple

1 apple= banana

Hence opportunity cost = 4/5

i.e. Option A is right

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.