SOLUTION: AB passes through the points (1, 3) and (3, 17). If CD is perpendicular to AB, what is the slope of CD?

SOLUTION: AB passes through the points (1, 3) and (3, 17). If CD is perpendicular to AB, what is the slope of CD?

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Question 613413: AB passes through the points (1, 3) and (3, 17). If CD is perpendicular to AB, what is the slope of CD?
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
AB passes through the points (1, 3) and (3, 17). If CD is perpendicular to AB, what is the slope of CD?
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The slope of CD is the negative reciprocal of the slope of AB.
Slope of AB=∆y/∆x=(17-3)/(3-1)=14/2=7
Slope of CD=-1/7
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