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, B, C, and D lie on the same line.
AB and CD are perpendicular lines.
AB and CD are parallel lines.
AB and CD are intersecting lines but are not perpendicular.
AB and CD are parallel lines.

Question

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, B, C, and D lie on the same line.
 AB and CD  are perpendicular lines.
 AB and  CD are parallel lines.
 AB and  CD are intersecting lines but are not perpendicular.
AB and  CD are parallel lines.

aum · Answer

Calculate the slope of AB.
Calculate the slope of CD.

$\large Slope = \frac{y_2-y_1}{x_2-x_1} $