Graph the function. If there is a removable discontinuity, repair the break by redefining the function using an appropriate piecewise-defined function. 
Definitions:
Economically Efficient
A situation where resources are allocated in a way that maximizes the net benefit to society or minimizes the cost of achieving a set output level.
Deadweight Loss
A loss of economic efficiency that can occur when equilibrium for a good or a service is not achieved or is not achievable.
Social Cost
The total cost to society of an activity or decision, including both direct costs borne by the individual and indirect costs absorbed by the broader community.
Monopoly Price
The price set by a monopolist, which is typically higher than in competitive markets because the monopolist maximizes profit by producing where marginal revenue equals marginal cost.
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