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Mathematics 8 Online
OpenStudy (daedae17):

What is the slope of a line perpendicular to line (-7,0) (0,4) ? A.4/7 B.-4/7 C.-7/4 D.7/4

Parth (parthkohli):

1) get the slope of the line which passes through these points. 2) get the reciprocal of that. 3) make it negative.

OpenStudy (anonymous):

for perpendicular lines the product of their slopes equals -1

OpenStudy (anonymous):

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