Question

How many lines are there which are parallel to $x-$axis and have a distance $5$ units.

Answer 1

Estimate the number of possible lines:

The equation of a line parallel to the $x-$axis is in the form

$y=\pm b$

Here $b$ is given as $5$ units.

$\therefore$Equations of the lines are $y=5$ and $y=-5$.

Hence, two lines are possible.