anonymous
  • anonymous
The line through the origin perpendicular to the line x-3y=9 (write an equation of the line described)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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inkyvoyd
  • inkyvoyd
you have f(0)=0 and you want to find the line perpendicular to x-3y=9 Note that perpendicular lines have slopes that are -1/m, if m is the slope of the original line.
anonymous
  • anonymous
thanks, I am having trouble working this out, can you help me?
inkyvoyd
  • inkyvoyd
write the equation for the line you're given in terms of y, so it looks like y=blah blah

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inkyvoyd
  • inkyvoyd
(move everything by y to the right side of the equation)
anonymous
  • anonymous
this is what I got -3y=9-x
inkyvoyd
  • inkyvoyd
divide both sides by -3
inkyvoyd
  • inkyvoyd
y=x/3-3
inkyvoyd
  • inkyvoyd
what is the slope?
anonymous
  • anonymous
i got 1/3
inkyvoyd
  • inkyvoyd
ok, so if m=1/3 what is -1/m?
anonymous
  • anonymous
im not sure... that's what im confused on
inkyvoyd
  • inkyvoyd
|dw:1378663158299:dw|
anonymous
  • anonymous
ok, thanks

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