# 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, pi, comma, 2, point, 75, right parenthesis, and it has a maximum point at left parenthesis, start fraction, 5, divided by, 4, end fraction, pi, comma, 6, point, 75, right parenthesis.
What is the amplitude of the function?
units
Do 4 problems