In an inverse relationship when one variable increases the other

In an inverse relationship when one variable increases the other decreases.

Explanation:

In an inverse relationship when one variable increases the other decreases; when one variable decreases the other increases. For example, the quantity of people needed to paint a wall: If 3 people spend 6 days painting the wall, 6 people (the double) will spend less time, in this case the half, 3 days. It can be concluded that more people will spend less time, and fewer people will spend more time.

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).