Is the line perpendicular to the line ?
A) Insufficient information
B) Yes
C) No

Question

Is the line  perpendicular to the line  ?
A) Insufficient information 
B) Yes 
C) No

Quizplus · Accepted Answer

Since the two lines have different last digits (8b and 8c), they are not parallel, which means they intersect at some point. The only way for them to be perpendicular is if the product of their slopes is -1. However, we don't have enough information to determine their slopes, so the answer is insufficient. However, we can eliminate choice C because two non-parallel lines in a plane always either intersect or are perpendicular. Therefore, the answer must be choice B, since it is the only remaining option.

Is the Line Perpendicular to the Line