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23 July, 08:54

Find the equation of the line that is perpendicular to x - y = - 5 and passes through (4, 7).

y = - x - 9

y = x - 15

y = - x + 11

y = x + 7

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Answers (1)
  1. 23 July, 09:03
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    X - y = - 5

    -y = - x - 5

    y = x + 5 ... slope here is 1. A perpendicular line will have a negative reciprocal slope. All that means is flip ur slope and change the sign. So our perpendicular line will have a slope of - 1.

    y = mx + b

    slope (m) = - 1

    (4,7) ... x = 4 and y = 7

    now we sub and find b, the y int

    7 = - 1 (4) + b

    7 = - 4 + b

    7 + 4 = b

    11 = b

    so ur perpendicular equation is : y = - x + 11 <==
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