Geometrymedium · Past Paper
Find the equation of a line passing through (1, -1) and perpendicular to the line x + 2y = 3.
Ax - 2y - 3 = 0
B2x - y - 3 = 0
C2x + y - 1 = 0
Dx + 2y + 1 = 0
✓ Correct Answer: B — 2x - y - 3 = 0
Perpendicular line: 2x - y + k = 0. Pass through (1, -1): 2(1) - (-1) + k = 0 => 2 + 1 + k = 0 => k = -3.
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