Hello there!
Since perpendicular lines have slopes that are opposite reciprocals, then the answer to your question is -1/2.
Now, what exactly is an opposite reciprocal? It's a number flopped over and made negative:
2
-2
-1/2
Now, parallel lines have the samre slope.
Hence, the slope of the line parallel to the given line is 2; the slope of the line perpendicular to the line is -1/2 (Answer)
Hope it helps.
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Good luck.
