Trying to my son with foundations of algebra simplifying

For the equations below which statement is true ?

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

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?