Question

Based on the production possibilities curve for books and pencils shown, what is the opportunity cost of producing a book?

How to find
there is only 2 numbers the graph just says 10 books 30 pencils with a line going through it

Answer 1

If the PPF’s endpoints are 10 books (all-books point) and 30 pencils (all-pencils point) and the curve is a straight line, the tradeoff is constant:

Opportunity cost of 1 book = (30 pencils) / (10 books) = 3 pencils.

(Equivalently, the opportunity cost of 1 pencil = 1/3 of a book.)