Please answer need fast

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.

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)