Final answer:
The amplitude of a wave is a measure of the maximum displacement of the medium from its equilibrium position. It can be represented as the distance from the crest to the equilibrium position or from the trough to the equilibrium position.
Step-by-step explanation:
The amplitude of a wave is a measure of the maximum displacement of the medium from its equilibrium position. It can be represented as the distance from the crest to the equilibrium position or from the trough to the equilibrium position. The amplitude can be measured in centimeters or meters.