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Question 852003: identify the lines that are perpendicular: y=4; y=3x; x=4; y+2=3(x+7)
Answer by Seutip(231)   (Show Source):
You can put this solution on YOUR website! To know the perpendicular lines for this equation we need to find the equation y=mx+b where m is the slope and the perpendicular equation to it is it's negative reciprocal which is -1/m.
In y=4, m is 0 therefore its perpendicular is undefined.
In y=3x, m is 3 therefore its perpendicular is y=-1/3x
In x=4, it is not a slope equation so its undefined.
In y+2=3(x+7) we need to further simplify to get y,
y+2=3x+21
y=3x+29
m is 3 so the perpendicular is
y=-1/3x+29
HOPE THAT HELPS!
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