Waves have energy that causes particles in matter to vibrate. So, it stands to reason that
1. The higher the energy, the slower the particles vibrate (which means a lower frequency).
2. The higher the energy, the faster the particles vibrate (which means a higher frequency)
3. The lower the energy, the slower the particles vibrate (which means a higher frequency)
4. The lower the energy, the faster the particles vibrate (which means a lower frequency)