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:
Multiphase
Pertaining to processes, systems, or tasks that occur or are executed in several distinct stages.
Unlimited Queue
A theoretical concept where the queue or line of customers or items waiting for service can grow indefinitely without any bounds.
Negative Exponential
A statistical distribution often used to model the time between independent events that happen at a constant average rate.
Poisson
A probability distribution that represents the likelihood of a certain number of events happening within a specified time or space interval.
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