The graph below is one complete cycle of the graph of an equation containing a trigonometric function. Find an equation to match the graph. If you are using a graphing calculator, graph your equation to verify that it is correct. 
Definitions:
Below-market Pricing
Setting the price of a product or service lower than the prevailing market rates to attract customers or gain market share.
Above-market
Pricing or valuing something higher than the general market rate or expected standard.
Prestige Pricing
A pricing strategy where prices are set higher than competitors to convey an image of exclusivity or superior quality.
Price Lining
A pricing strategy where products are sold at predetermined price points, each representing a distinct level of quality or features.
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