What is the first step to show that two lines are perpendicular, by looking at the equations of the lines, if they are written in standard form?

Question

anonymous · Answer

If they both have the same slope, they will be perpendicular. If it's in standard form(y = mx + b) then look for "m" which is slope, if "m" is the same for both equations then the two equations will be perpendicular.

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loser66 · Answer

https://www.google.com/search?q=perpendicular+lines+slope&tbm=isch&tbo=u&source=univ&sa=X&ei=IxwOU7DUEdCmsATpzIDwCg&ved=0CEcQsAQ&biw=1440&bih=688

loser66 · Answer

That's what I said before.