Answer:
a straight line
Explanation:
The Production possibilities frontier is a curve that shows the various combination of two goods a company can produce when all its resources are fully utilised.
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.
If opportunity cost was constant, there would be no trade off between goods, so the curve would be a straight line
