Which formula represents the relationship between frequency and period?

The correct formula representing the relationship between frequency and period is Frequency = 1/Period. This relationship indicates that frequency, which is the number of cycles per second, is inversely related to the period, which is the time taken for one cycle to occur.

In essence, if you increase the period (the duration of one cycle), the frequency must decrease because fewer cycles can occur in a set time. Conversely, if the period decreases, the frequency rises, as more cycles fit into the same timeframe. This direct mathematical relationship emphasizes that frequency and period are key characteristics of periodic phenomena, such as waves.

The other choices provided do not accurately reflect the relationship between frequency and period. For instance, the option that states frequency involves wavelength and period combines unrelated concepts in wave mechanics. Another suggestion that incorporates amplitude and period misrepresents how these properties interact. Lastly, the option related to speed and wavelength pertains to wave speed calculations rather than establishing a direct link to frequency and period.