At which values of x does the function F(x) have a vertical asymptote? Check all that apply

F(x) = 1/(x - 4)(x + 1)

a 0
b -1
c 2
d 1
e 4
f -4

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample