Help need to know the cross section shape

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.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?