# Amplitude 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, 8, point, 7, comma, 7, point, 2, right parenthesis, and it has a minimum point at left parenthesis, 6, point, 2, comma, 3, point, 8, right parenthesis.
What is the amplitude of the function?
units