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## Algebra 2

### Course: Algebra 2>Unit 11

Lesson 6: Amplitude, midline and period

# Amplitude 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, start fraction, 2, divided by, 3, end fraction, pi, comma, 1, point, 2, right parenthesis, and it has a minimum point at left parenthesis, start fraction, 4, divided by, 3, end fraction, pi, comma, minus, 3, point, 4, 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 lowest part of the graph labeled (four pi over three, negative three and four tenths). A point is on the graph and midline at (two pi over three, one and two tenths).
What is the amplitude of the function?
units
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