# Period of sinusoidal functions from graph

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### Problem

Below is the graph of a trigonometric function. It intersects its midline at left parenthesis, minus, 10, point, 7, comma, minus, 3, right parenthesis and again at left parenthesis, minus, 5, point, 5, comma, minus, 3, right parenthesis.
What is the period of the function? Give an exact value.
units