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OpenStudy (woahning):
I'll give you a medal and become your fan. This is the last question and I'm just terrible at this topic. Is the line through points P(-8,-10) and Q(-5.-12) perpendicular to the line through points R(9,-6) and S(17,-5)? Explain?
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OpenStudy (perl):
compare the slopes of the two lines
OpenStudy (perl):
slope PQ = -2/3 slope RS = 1/8
OpenStudy (perl):
the lines are neither parallel (same slope) nor perpindicular ( negative reciprocal )
OpenStudy (woahning):
is it like the y2-y1/x2-x1 formula
OpenStudy (perl):
yes
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OpenStudy (perl):
that is how i calculated the slope
OpenStudy (woahning):
okay thank you so much
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