SOLUTION: If the graph of the equation ax+3y=9 is perpendicular to the graph of the equation 3x+y=-4, find the value of a

SOLUTION: If the graph of the equation ax+3y=9 is perpendicular to the graph of the equation 3x+y=-4, find the value of a

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Question 318876: If the graph of the equation ax+3y=9 is perpendicular to the graph of the equation 3x+y=-4, find the value of a
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Convert both equations to slope-intercept form,

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Perpendicular lines have slopes that are negative reciprocals,

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