Amplitude.
The amplitude A is the maximum elongation of each point of the wave with respect to the central or equilibrium position.
In a sinusoid wave is the maximum distance in the absolute value of the curve measured from the x axis, can be represented as y(t) = A sen (ωx + φ).
Example:
y(t) = 10 sin (2πx), Where the amplitud of the sine wave is A = 10
