Question

The distance between line $y=3$ and $y=-3$ is ___ units.

• A. 0.0
• B. 3
• C. 6
• D. 9

Answer 1

The correct option is C 6

The graph of $y=k$ is a line parallel to x-axis at a distance of $k$ units and passing through the point $(0,k)$.

$⟹$ $y=3$ is a line parallel to x-axis at a distance of $3$ units right of the origin and passing through the point $(0,3)$.
$⟹$ $y=-3$ is a line parallel to x-axis at a distance of $3$ units left of the origin and passing through the point $(0,-3)$.

Therefore, both the lines are parallel to each other and the distance between them is $3+3=6$ units.