SOLUTION: Find the value of k so that the line containing the points (6,8) and (k,6) is parallel to the line containing the points (−7,−9) and (0,−12).

Question 785280: Find the value of k so that the line containing the points (6,8) and (k,6) is parallel to the line containing the points (−7,−9) and (0,−12).
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Slope of first pair, .
Slope of second pair,

In order for the lines of each pair to be perpendicular, their slopes must be negative reciprocals of eachother:

Your other two questions are handled similarly.
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SOLUTION: Find the value of k so that the line containing the points (6,8) and (k,6) is parallel to the line containing the points (&#8722;7,&#8722;9) and (0,&#8722;12).

SOLUTION: Find the value of k so that the line containing the points (6,8) and (k,6) is parallel to the line containing the points (−7,−9) and (0,−12).