H(x)=-4x+12 what is h(3a)-h(2a) in terms of "a"

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 with number 6 , explain how to get 1978

Select the correct answer and solve for y