The Graph Below Is One Complete Cycle of the Graph

question 4

Multiple Choice

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. ​
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Definitions:

Income Quintile

A statistical measure dividing the population into five equal groups according to income level, to analyze the distribution of income or wealth.

Income Mobility

Refers to the ability for an individual or family to move up or down the economic ladder within a society over time.

Income Quintile

A method of dividing a population into five equal groups based on their income levels.

Lowest Quintile

The segment of a population that falls within the bottom 20% in terms of income distribution or other statistical measurement.