Answer:
The energy of a wave is proportional to the square of its amplitude
Explanation:
The graph in this problem is missing.
However, we can describe what is the relationship between amplitude and energy of a wave.
In fact, for a wave, the energy carried by it is proportional to the square of its amplitude:

where
E is the energy of the wave
A is the amplitude
This means that, for instance:
- as the amplitude of the wave increases by a factor of 2, the energy carried by the wave increases by a factor of 4
- As the amplitude of the wave increases by a factor of 3, the energy carried by the wave increases by a factor of 9
... and so on.