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## Algebra 2

### Course: Algebra 2>Unit 11

Lesson 6: Amplitude, midline and period

# Period of sinusoidal functions from graph

You might need: Calculator

## Problem

Below is the graph of a trigonometric function. It intersects its midline at left parenthesis, 3, point, 7, comma, 5, right parenthesis and again at left parenthesis, 5, point, 9, comma, 5, right parenthesis.
A graph of a trigonometric wave on an x y coordinate plane. The x and y axes scale by one. There is a point on the midline of the graph at (three and seven tenths, five). When the wave touches the midline again, it is at point (five and nine tenths, five).
What is the period of the function? Give an exact value.
units
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