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Course: Algebra 2 > Unit 11
Lesson 5: Amplitude, midline and periodMidline, amplitude, and period review
Review the basic features of sinusoidal functions: midline, amplitude, and period.
What are midline, amplitude, and period?
Midline, amplitude, and period are three features of sinusoidal graphs.
Want to learn more about midline, amplitude, and period? Check out this video.
Finding features from graph
Given the graph of a sinusoidal function, we can analyze it to find the midline, amplitude, and period. Consider, for example, the following graph.
It has a maximum point at , then a minimum point at , then another maximum point at .
The horizontal line that passes exactly between (the maximum value) and (the minimum value) is , so that's the midline.
The vertical distance between the midline and any of the extremum points is , so that's the amplitude.
The distance between the two consecutive maximum points is , so that's the period.
Want to try more problems like this? Check out these exercises:
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