Bunuel wrote:
Lines m and n are perpendicular to one another. Is the product of the slopes of the lines less than the product of the Y-intercepts of the two lines?
(1) Only line m passes through the origin.
(2) None of the lines are parallel to either axis
Let Line m be y=mx+c and line n be p=qx+d
We know m*q = -1
Question: is mq<cd
(1) only line m passes through origin
c=0 and d is not equal to 0
cd=0 and mq = -1
Sufficient
(2) none of the lines are parallel to either axis
no information about c and d
Hence not sufficient
A
_________________
We must try to achieve the best within us
Thanks
Luckisnoexcuse