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:
Birthrates
The number of live births per thousand of population per year.
Demographers
Experts who study populations, including their sizes, distributions, and trends, by analyzing birth, death, migration, and aging patterns.
Herbert Spencer
A British sociologist and philosopher known for applying the theory of natural selection to society, contributing to the development of social Darwinism.
Social Change
The transformation of cultural, social, and political structures over time, often driven by collective behavior and social movements.
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