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Mathematics 20 Online
OpenStudy (anonymous):

what's the slope of Line perpendicular to line across(3,0)and(0,1),starting from (0,0)?!

Parth (parthkohli):

Slope of a perpendicular line is its NEGATIVE RECIPROCAL.

Parth (parthkohli):

First, determine the slope of the line, then its negative reciprocal.

OpenStudy (anonymous):

y=mx+k y=-1/m+d !!

Parth (parthkohli):

\(\Large \color{MidnightBlue}{\Rightarrow Slope = {y_{2} - y_{1} \over x_{2} - x_{1}} }\)

Parth (parthkohli):

See my tutorial for more http://openstudy.com/study#/updates/4fb9f5a9e4b05565342ee28c

OpenStudy (anonymous):

I get firest slope is -1/3 means the perpendicular is 3!!,?

OpenStudy (anonymous):

I'm confused about the last part "starting from (0,0)?!" why do you need this if the information before it is all you need to find the slope

Parth (parthkohli):

Of course.

Parth (parthkohli):

You just need two pairs of co-ordinates. We have 3 here!

Parth (parthkohli):

Or wait, the perpendicular line will start from 0,0?

OpenStudy (anonymous):

ohhh yep I forget that easy now thanks

Parth (parthkohli):

:P ok

OpenStudy (anonymous):

but why from the draw I found the slope 2 but by your way you'll get 3 !!!! confused her ! or that not working with this kind of lines !!

OpenStudy (anonymous):

|dw:1337938018460:dw| !!!

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