Which equation has a slope of 6 and interceptions the y-axis at -4

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.

Icould really use some with this question.

Find the value of x. round the length to the nearest tenth