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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?
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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. You can click "Best Response" to give medals.
That's what I said before.
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