Graph the two lines y = .5x + 1 and y = - 2x + 9 in

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Graph the two lines y = .5x + 1 and y = - 2x + 9 in the standard window [-10, 10] by [-10, 10]. Do they appear perpendicular? If not, use ZSquare to obtain true aspect, and look at the graphs.
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Finite Mathematics and Its Applications

ISBN: 978-0134768632

12th edition

Authors: Larry J. Goldstein, David I. Schneider, Martha J. Siegel, Steven Hair

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