Geometryeasy · Past Paper
If the slope of line L1 is 1/2, then the slope of a line L2 perpendicular to L1 is:
A1/2
B2
C-2
D-1/2
✓ Correct Answer: C — -2
m1 * m2 = -1 => (1/2) * m2 = -1 => m2 = -2.
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