If the graph of a rational function R has the vertical asymptote x = 4, the factor x - 4 must be present in the denominator of R. True or False

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?