Answer:
5 units of x
Step-by-step explanation:
Keisha's production possibilities frontier:
100x 20y
50x 30y
0x 40y
the opportunity cost of producing 1 unit of y = 50/10 = 5 units of x
The opportunity cost refers to the extra costs or benefits lost resulting from choosing one investment or activity over another alternative. In this case, if Keisha wants to produce one more unit of y, she will not be able to produce five units of x (trade-off)