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Question 242685:
1. Write an equation of the line that passes through (10,-4) and is perpendicular to the line whose equation is y = 2/5x - 8.
A.
y = 2/5x - 8
B.
y = 2/5x + 58/5
C.
y = -5/2x + 21
D.
y = -5/2x - 29
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Write an equation of the line that passes through (10,-4) and is perpendicular to the line whose equation is y = 2/5x - 8.
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The slope, m, of the given eqn is 2/5.
The slope of lines perpendicular is the negative inverse, = -5/2.
Use y = mx+b and the point to find b.
-4 = (-5/2)*10 + b
b = 21
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y = (-5/2)x + 21
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All that space and the choices are not needed.
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