Find whether the lines L 1 and L 2 passing through the pairs of points are parallel,perpendicular,or neither.

Answer to Problem 70E
The two lines L 1 and L 2 are perpendicular to each other.
Explanation of Solution
Given:
It is given in the question that the two lines having points are
Concept Used:
In this,use the concept of slope equation and some more concepts that when the slopes are same then it is parallel ,if the slopes are negative reciprocals of one another,then they are perpendicular and if the lines do not have either of the two then neither parallel nor perpendicular.
Calculation:
Now,use the slope equation for line L 1 ,
Again use the slope equation for line L 2 ,
As seen above, and with the concept, it clearly described that the slopes are negative and reciprocal of each other.So, they are perpendicular.
Conclusion:
It is perpendicular.
Chapter 1 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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