Q201 / 270 · NDA 2019 (Phase 2) · Mathematics

The equation $a x+b y+c=0$ represents a straight line

  • A
    for all real numbers, $a, b$ and $c$
  • B
    only when $a \neq 0$
  • C
    only when $b \neq 0$
  • Correct answer
    D
    only when at least one of $a$ and $b$ is non-zero

Solution

$a x+b y+c=0$ represents a straight line only when at least one of $a$ and $b$ is non zero.

Hence, the correct answer is option: 'D'.

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