Understanding the Relationship

* Frequency (f): How many waves pass a point in one second (measured in Hertz, Hz).

* Wavelength (λ): The distance between two consecutive crests (or troughs) of a wave (measured in meters, m).

* Speed (v): How fast the wave travels (measured in meters per second, m/s).

The Formula

The relationship between these three quantities is:

* v = fλ

Solving for Wavelength

1. Rearrange the formula to solve for λ:

λ = v / f

2. Plug in the given values:

λ = 18 m/s / 2.5 Hz

3. Calculate the result:

λ = 7.2 meters

Therefore, the wavelength of the wave is 7.2 meters.