which pair of slopes could represent perpendicular lines?
1/7 , 7
1/2 , 2/4
-3/4 , 4/3
1/3 , 1/3

Question

which pair of slopes could represent perpendicular lines? 
  1/7 , 7
  1/2 , 2/4
-3/4 , 4/3
  1/3 , 1/3

jdoe0001 · Answer

keep in mind that perpendicular lines have NEGATIVE RECIPROCAL slopes

what does that mean?

that if one line has slope of say    2     the perpendicular to that will have a slope of 
RECIPROCAL  1/2
NEGATIVE   -1/2

anonymous · Answer

so 1/7 , 7?

anonymous · Answer

or -3/4 , 4/3

jdoe0001 · Answer

1/7 and 7 won't work

why?   because, you do have the RECIPROCAL part, but not the NEGATIVE part

anonymous · Answer

A perpendicular line would have negative reciprocals. -3/4 and 4/3 are negative reciprocals. -3/4 is flipped and turned positive to be 4/3. These are negative reciprocals, so they make perpendicular lines