Question

The line $l x + m y + n = 0$ will be parallel to x-axis, if.

• A. $l = m = 0$
• B. $m = n = 0$
• C. $l = n = 0$
• D. $l = 0$

Answer 1

Answer: (D)

$l = 0$

Answer 2

Parallel to x-axis $\Rightarrow y = A$, so l must be zero.