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30 January, 09:59

For which set of lines is it reasonable to state that the two lines are almost perpendicular to each other?

a. y = 2.1x 3, y = 2.1x 5

b. y = 0.9x 5, y = - 1.26x 8

c. y = 5x 1.25, y = - 5x 1.25

d. y = 3/4x 0.28, y = 4/3x 0.29

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Answers (1)
  1. 30 January, 12:27
    0
    When you multiply their slopes and it gets to - 1

    y=mx+b

    m=slope

    A. 2.1*2.1=4.41

    B. 0.9*-1.26=-1.134

    C. 5*-5=-25

    D. 3/4 times 3/4=1

    B is answer
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