The graph shows the monthly revenue in millions of dollars of a growing company after the company doubled its advertising. Use the graph to solve the problem. 
-How many months after the company doubled its advertising did the maximum monthly revenue occur.
Definitions:
Implied Warranties
Guarantees legally assumed in a transaction, suggesting that the product sold will meet certain standards of quality and reliability.
Caveat Emptor
A Latin phrase meaning "let the buyer beware," indicating that the buyer assumes the risk regarding the quality and condition of the item purchased.
Sales Contract
A legal agreement between a buyer and a seller specifying the terms and conditions of the sale of goods or services.
Strict Product Liability
A legal doctrine that makes manufacturers, distributors, or sellers liable for any defects in the products they market, regardless of fault or negligence.
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