If we plot John's opportunity cost per window on the vertical axis and the number of windows cleaned each day on the horizontal axis, we will have John's curve for window-cleaning services.

Supply

Explanation:

The supply curve can be regarded as graphic representation that display

correlation that exist between the cost of a good/service as well as quantity supplied for particular period. on the left vertical axis there is price, while on Horizontal axis there is quantity supplied. The vertical distance between supply curve as well as horizontal axis is the marginal opportunity cost required to add a unit to quantity. The area under the supply curve goes up to quantity supplied is total alternative opportunity cost, and it's Summation of marginal costs.

For instance, If we plot John's opportunity cost per window on the vertical axis and the number of windows cleaned each day on the horizontal axis, we will have John's supply curve for window-cleaning services.

answer; is the sum of all individual demands curves;

answer; charters;