If the frequency increased, how would the change impact the wave speed and wavelength?

The frequency and wavelength of a wave are related. When frequency increases more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases.

Explanation:

The waves travel at the same speed, but the observed frequency depends on any relative motion between the observer and source. When the observed frequency changes, so does the wavelength. If the observer and source are moving toward each other, then the frequency increases and the wavelength decreases.

Explanation: I hope this helped you understand

because if the tool that you are using is not balanced it there would be false mass.

the answer is the index of refraction of the second medium is higher. i just took the test.