If labor becomes more productive, the production possibilities frontier will:

Shift outwards.

Explanation:

The production possibilities frontier or curve is the curve that shows various combinations or bundles of goods that an economy produces by using its all resource and if there is any point inside the curve then it will depict the inefficiency or underutilization of resources. Moreover, the PPF curve shifts outwards when there is an improvement in technology, due to which the output has increased. Similarly, the increase in output due to labor productivity will result in the rightward shift in the PPF curve.

Write a proportion using the ratios. Find the cross products. If the cross products are equal, then the ratios form a proportion.