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23 June, 10:24

Select the pair of equations whose graphs are perpendicular.

A.) 5x - 8y = 9

12x - 5y = 7

B.) 3x + 6y = 8

y = 3x - 8

C.) y = 2x - 7

x + 3y = 3

D.) 2y = - 3x + 5

2x - 3y = 4

+1
Answers (2)
  1. 23 June, 10:27
    0
    You know that 2 lines are perpendicular when the fulfil

    m1*m2 = - 1

    from D.)

    m1 = - 3/2

    m2 = 2/3

    so

    m1*m2 = - 3/2*2/3 = - 1

    this conclude that they are perpendicular each other
  2. 23 June, 10:29
    0
    D. The lines intersect to form perpendicular.
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