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:
Simple Interest Rates
The rate at which interest is calculated solely on the initial amount of capital, without compounding.
Principal Investment
The original amount of money invested or loaned, on which basis interest and returns are calculated.
GIC
Stands for Guaranteed Investment Certificate, a secure investment that promises to return your principal plus interest.
Investment Savings
Funds set aside in financial instruments or accounts with the goal of generating income or profit over time.
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