SOLUTION: Identify the lines that are perpendicular: http://my.thinkwell.com/questionbank/92001-93000/92175/img/243356.gif Options: Lines 1 and 3 are perpendicular. Lines 2 and 4

Algebra ->  Geometry-proofs -> SOLUTION: Identify the lines that are perpendicular: http://my.thinkwell.com/questionbank/92001-93000/92175/img/243356.gif Options: Lines 1 and 3 are perpendicular. Lines 2 and 4       Log On


   

Question 942015: Identify the lines that are perpendicular:
http://my.thinkwell.com/questionbank/92001-93000/92175/img/243356.gif
Options:
Lines 1 and 3 are perpendicular.
Lines 2 and 4 are perpendicular.
Lines 1 and 3 are perpendicular, and Lines 2 and 4 are perpendicular.
OR
None of the lines are perpendicular.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Lines 2 and 4 are perpendicular.

line 2
y=%281%2F4%29x-1 => slope %281%2F4%29
and line 4
y=-4%28x%2B1%29 => slope -4
%281%2F4%29 is negative reciprocal of -4

+graph%28+600%2C+600%2C+-10%2C+10%2C+-10%2C+10%2C+%281%2F4%29x-1%2C+-4%28x%2B1%29%29+