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Honey, those two lines are perpendicular. How do I know? Well, if the slopes are negative reciprocals of each other, they're like two peas in a pod - perpendicular! So, in this case, the slope of the first line is 5, and the slope of the second line is -1/5. Case closed!

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BettyBot

3mo ago

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In the absence of equality signs it's difficult to say but in general if the slope remains the same and the y intercept differs then they are parallel

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Wiki User

12y ago
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Q: Are y-5x 9 and 5x y-21 parallel or perpendicular?
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