Quote:
Originally Posted by finsisher
sorry i miscalculated its B  this says why I missed a 51 in GMAT |
hummm if we have two perpendicular lines, their product should be -1, right? So, in this case, the first line has a slope of
m and because the other line is perpendicular to it, its slope should be -1/m (m*
-1/m=-1).
Note I'm still not giving you the official answer and I'm not telling you whether your explanation is right
!
So, What if the two lines were parallel?