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15 February, 17:38

Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

y=-2x+4

-5x+10y=5

A:Parallel

B:Perpendicular

C: Neither

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Answers (1)
  1. 15 February, 17:51
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    y=-2x+4

    the slope is - 2

    -5x+10y=5

    solve for y

    add 5x to each side

    10 y = 5x+5

    divide by 10

    y = 1/2 x + 1/2

    the slope is 1/2

    take the negative reciprocal of - 2

    - (1/-2) = 1/2

    The two lines are perpendicular
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