Answer:
c
Step-by-step explanation:
The Production possibilities frontiers is a curve that shows the various combination of two goods a company can produce when all its resources are fully utilised.
The PPF is concave to the origin. This means that as more quantities of a product is produced, the fewer resources it has available to produce another good. As a result, less of the other product would be produced. So, the opportunity cost of producing a good increase as more and more of that good is produced.
So, the PPF exhibits diminishing return. The slope of the PPF is different at different points. this makes the PPF a curve
the budget constraint is a straight line that shows the various combinations of goods a consumer can consume given her income. the budget constraint is a straight line because the slope is constant at each point on the curve
Also, the slope of the budget constraint is the relative prices of the two goods