Line A is drawn on a rectangular coordinate plane. If the coordinate pairs (3, 2) and (-1, -2) lie on line A, which of the following coordinate pairs does NOT lie on a line that is perpendicular to line A?
(5, 8) and (4, 9)
(3, -1) and (4, -2)
(-1, 6) and (-4, 9)
(2, 5) and (-3, 2)
(7, 1) and (6, 2)
Line A is drawn - coordinate..MGMAT
This topic has expert replies
- rommysingh
- Master | Next Rank: 500 Posts
- Posts: 112
- Joined: Thu Mar 22, 2012 9:33 am
- Thanked: 1 times
- Followed by:1 members
Slope of line A = (y2 - y1)/(x2 - x1) = 1
Product of slopes of two perpendicular lines = -1
This implies that the slope of line perpendicular to A = -1
Now, just use the above formula to find a slope which is NOT -1
Answer is D
Product of slopes of two perpendicular lines = -1
This implies that the slope of line perpendicular to A = -1
Now, just use the above formula to find a slope which is NOT -1
Answer is D
Regards
Kanwar
"In case my post helped, do care to thank. Happy learning
"
Kanwar
"In case my post helped, do care to thank. Happy learning
![Smile :)](./images/smilies/smile.png)