Find the distance between the points P(3, 4) and Q(-1, 1).
A3
B5CORRECT
C7
D25
GCEMathematicsCoordinate Geometry2023
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Why the answer is B, and why the others tempt you.
Using the distance formula: PQ = √[(−1−3)² + (1−4)²] = √[(−4)² + (−3)²] = √[16 + 9] = √25 = 5. Option D (25) is a common error of forgetting to take the square root, and option A (3) and C (7) are plausible arithmetic mistakes.
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