SOLUTION: Determine whether the lines L1 and L2 passing through the pairs of points are parallel, perpendicular or neither. #56 L1 (4,8), (-4,2) L2 (3,-5), (-1, 1/3)

Question 181194This question is from textbook College Algebra the Graphing Approach
: Determine whether the lines L1 and L2 passing through the pairs of points are parallel, perpendicular or neither.
#56
L1 (4,8), (-4,2)
L2 (3,-5), (-1, 1/3) This question is from textbook College Algebra the Graphing Approach

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Determine whether the lines L1 and L2 passing through the pairs of points are parallel, perpendicular or neither.
#56
L1 (4,8), (-4,2)
slope = (8-2)(4--4) = 6/8 = 3/4
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L2 (3,-5), (-1, 1/3)
slope = (-5-(1/3)/(3--1) = (-16/3)/(4) = -4/3
------------------------------------------------
Since (3/4)(-4/3) = -1, the lines are perpendicular.
=======================================================
Cheers,
Stan H.

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