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Line EF passes through the points (0, 1) and (3,3). Line JK passes through the points (8, 2) and (6, 5). These lines are

A)skew.

B)parallel.

C)concurrent.

D)perpendicular.

 Mar 1, 2018
 #1
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Slope of first line = rise/run  =  y2-y1/(x2-x1)  =  (3-1)/(3-0) = 2/3

 

Slope of second line =  3/-2 = -3/2  

The second slope is the negative inverse of the first, so the lines are perpindicular

 Mar 1, 2018

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