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Question 175866: Determine of the graphs of the 2 equations are perpendicular?
y=7x-9
2y=7-x
Answer by nerdybill(7384)   (Show Source):
You can put this solution on YOUR website! y=7x-9
2y=7-x
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First, convert both to "slope-intercept" form of
y = mx + b
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y=7x-9
y=(-1/2)x + 7/2
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Slope of equation 1 is 7
Slope of equation 2 is -1/2
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If the two lines are perpendicular, multiplying the two slopes together should equal -1.
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7 * (-1/2) = -7/2
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Since it does not, the two lines are NOT perpendicular.
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