Can you represent the distance of an object underground using negative numbers of

In the 30-60-90 triangle below side s has a length of and side r has a length

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Whats the name of the vertical axis