Question

Write a linear equation representing a line that is parallel to the $y-$axis and is at a distance of $2$ units on the left side of the $y-$axis.

Answer 1

Equation of a line:

Any line that is parallel to the $y-$axis is of the form $x=c$, where $c$ is any real number and $c$ is the distance of the line from the $y-$axis.

Since the line is at a distance of $2$ units on the left side of $y-$axis.

$\therefore x=-2$

Hence, the equation of the required line is $x=-2$.