alleryIf a point is reflected in the x-axis, the new co-ordinates of (a, b) become
A(-a, b)
B(a, -b)
C(-a, -b)
D(b, a)
Answer & Solution
Correct answer: B. (a, -b)
1. Reflection in x-axis flips the sign of the y-coordinate.
2. x stays the same.
3. So (a, b) becomes (a, -b).
4. Hence option A is correct.
_Source: Selina Concise Mathematics Class 9, Ch 26 Co-ordinate Geometry (Mistral OCR'd PDF), section on reflection_
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