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Suppose your friend says the line y=-2x +3 is perpendicular to the line x+2y=8. Do you agree? Explain.
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Suppose your friend says the line y=-2x +3 is perpendicular to the line x+2y=8. Do you agree? Explain.
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Dec 4, 2018
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Suppose your friend says the line y=-2x +3 is perpendicular to the line x+2y=8. Do you agree? Explain.
Mathematics
high-school
Rahav
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Rahav
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if they are perpendicular then the product of their slope will = -1
y = 2x + 3 has slope of 2 ( because of the '2x')
x + 2y = 8
2y = -x + 8
y = -0.5x - 4
2 * -0.5 = -1 so they are perpendicular
So the friend was right
Joshcomley
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Dec 7, 2018
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Joshcomley
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No because if they were perpendicular their slopes would be opposite reciprocals
Ilya Ilin
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Dec 10, 2018
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Ilya Ilin
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