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Two lines are perpendicular. If one line has a slope of 1/21 , what is the slope of the other line?
A. 1/21
B. 1/21
C. 21
D. 21
 one year ago
 one year ago
Two lines are perpendicular. If one line has a slope of 1/21 , what is the slope of the other line? A. 1/21 B. 1/21 C. 21 D. 21
 one year ago
 one year ago

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mathstudent55Best ResponseYou've already chosen the best response.2
Perpendicular lines have slopes that are negative reciprocals. That isa fancy mathematical way of saying that if you have the slope of one line and you want the slope of a perpendicular to that line, filp the fraction and change the sign.
 one year ago

mathstudent55Best ResponseYou've already chosen the best response.2
1/21 Filp it: 21/1 = 21 Change sign: 21
 one year ago

seanwalsh1984Best ResponseYou've already chosen the best response.0
Flip the sign and negate it. 1/21 becomes 1/21.Now flip. Becomes 21.
 one year ago
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