Line l has a slope of the line through which of the following pair of points is perpendicular to l?
A. (21,-4), (-5,7)
B.(-7, -5),(4,7)
c. (7-7), (-5,4)
D.(-2,-5), (4,7)

Respuesta :

C) (7,7), (-5,4)
I hope it helps

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