# Help please?

##### 1 Answer

According to chegg :

The amplitude and period of a sinusoidal function represent the height and cycle length of a curve, respectively, which are important characteristics of the waveform. Amplitude is the height from the mean, or rest, value of the function to its maximum or minimum. **The period is the distance required for the function to complete one full cycle.**

And since a full cycle is from peak to peak:

Then we just need to look at which graph has *peaks to peaks*: