NDA Math Coordinate System and Straight Line

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Question : 27 of 92

Marks: +1, -0

The equation ax + by + c = 0 represents a straight line:

[NDA II 2019]

for all real numbers a, b and c
only when a ≠ 0
only when b ≠ 0
only when at least one of a and b is non-zero

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