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Course: Trigonometry > Unit 2

Lesson 7: Amplitude, midline, and period
Math
Trigonometry
Trigonometric functions
Amplitude, midline, and period
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Amplitude of sinusoidal functions from graph

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Problem

Below is the graph of a trigonometric function. It intersects its midline at (23π,1.2), and it has a minimum point at (43π,−3.4).
What is the amplitude of the function?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
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