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The lines shown below are perpendicular.If the green line has a slope of -1/9,what is the slope of the red line?
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4 votes
The lines shown below are perpendicular.If the green line has a slope of -1/9,what is the slope of the red line?

User Ido
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The slope of the red line is 9

When lines are perpendicular, their slope must me opposite reciprocals of each other

Reciprocal of -1/9 is -9

Opposite of -9 is 9

-1/9 —> 9

~~hope this helps~~
User Evan Nagle
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