Give the missing reasons for this proof (with picture)

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

Ineed to know the answer to this algebra question.