Question

Line A passes through the points (-8, 5) and (-5, 4). Line B passes through the points (0, 1) and (4, -1). Which of the following describes the relationship between line A an line B?
Lines A and B are parallel, because they have the same slope
Lines A and B are parallel, because they have opposite reciprocal
slopes.
Lines A and B are perpendicular, because they have opposite reciprocal
slopes.
Lines A and B intersect, because their slopes have no relationship.

Answer 1

so find the slopes for A and B. If they are m1 and m2, then you know that
m1 = m2 means A||B
m1 * m2 = -1 means A⊥B
So let 'er rip.

Answer 2

thank you!