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What is the slope of the line that is perpendicular to the line whose equation in 2x + y =4

What is the slope of the line that is perpendicular to the line whose equation in 2x + y =4
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What is the slope of the line that is perpendicular to the line whose equation in 2x + y =4

User RuiG
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k:\ y=m_1x+b_1\\\\l:\ y=m_2x+b_2\\\\k\ \perp\ l\iff m_1m_2=-1


2x+y=4\ \ \ |-2x\\\\y=-2x+4\to m_1=-2\\\\-2m_2=-1\ \ \ |:(-2)\\\\m_2=(1)/(2)

User Davecz
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