Two nonvertical lines have slopes m 1 and m 2 respectively. The lines are parallel if ________

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Two nonvertical lines have slopes m1 and m2 respectively. The lines are parallel if ________ and the ________ are unequal; the lines are perpendicular if ________.

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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