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Please help I’m really stuck
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Please help I’m really stuck

Please help I’m really stuck-example-1
User Hillery
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They are perpendicular if you put points (2,1) and (7,4) into x1 y1 you will find the slope of u which is 3/5. 3/5 is the opposite reciprocal of -5/3 proving that the lines are perpendicular! Enjoy
User Carpat
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