Geometrymedium · Past Paper
Which of these lines is perpendicular to y = 2x + 5?
Ay = 2x - 5
By = -2x + 5
Cy = -0.5x + 3
Dy = 0.5x + 3
✓ Correct Answer: C — y = -0.5x + 3
Slope of given line is 2. Perpendicular slope must be -1/2 or -0.5.
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