Select the equations that are parallel and perpendicular to y = -3x - 1 and that pass through the point (3, 1).
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OpenStudy (henrietepurina):
parallel: y = -3x + 6
perpendicular: y = 1/3 x + 2 and 2/3
parallel: y = -3x + 10
perpendicular: y = 1/3 x
parallel: y = -1/3 x
perpendicular: y = -3x
parallel: y = 1/3 x + 1
perpendicular: y = 3x - 1
OpenStudy (luigi0210):
Do you know what the slope is for a perpendicular line?
OpenStudy (henrietepurina):
yes
OpenStudy (luigi0210):
Then what is the perpendicular slope for -3?
OpenStudy (henrietepurina):
rise 3 run 1
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OpenStudy (henrietepurina):
on oops down 3 right 1
OpenStudy (henrietepurina):
|dw:1402261259823:dw|
OpenStudy (henrietepurina):
no wait oops again...|dw:1402261288632:dw|
OpenStudy (anonymous):
It's not the last two because the slope of a parallel line is the same. The slope of a perpendicular line is the opposite reciprocal of the original slope, so it would be 1/3. The second one passes through (3,1), so that would be it.
OpenStudy (henrietepurina):
Can I trust you?
This is my final exam?
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