Suppose the number of cases of persons in West Africa infected with the Ebola virus grows at a rate proportional to the total number of cases. Write a differential equation to represent the situation described above. Use n for number of cases of Ebola and t for the time in months.

Differential equation =  N(t) = S(t) + L(t) + I(t) + R(t) + D(t)

where;

S(t) is the number of infected individuals at time t;

L= Individuals who are infected but not infectious yet

I = the class of infected, infectious, and isolated individuals;

R = group of recovered individuals;

D(t) = the number of individuals who died of EVD at time t.

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there