Question

determine whether the lines are parallel, perpendicular or neither.
1. One line passes through the points (-1, 4) and (2, 6); another line passes through the points (2, -3) and (8, 1).
2. One line passes through the points (4, -3) and (-8, 0); another line passes through the points (-1, -1) and (-2, 6).
3. One line passes through the points (-3, 14) and (1, -2); another line passes through the points (0, -3) and (-2, 5).

Answer 1

1 is parallel but i dont know the last 2

Answer 2

for every one of these questions, you have to find the slopes.
-if the slopes are different but not perpendicular, they intersect once.
-if the slopes are perpendicular, they intersect at 90 degrees once.
-if the slopes are the same, you need to find the y intercepts because if the y intercepts are the same, then it's the same line. if they're not the same, then there are 2 parallel lines.