Question

Find the distance between $p(x_{1} ,y_{1} )$ and $q(x_{1} ,y_{1} )$ when: PQ is parallel to the y-axis.

Answer 1

If PQ is parallel to y-axis,

⇒ the value of the y coordinate is the same

Therefore the distance is the difference between the value of the two x-coordinates

⇒ Distance = x2 - x1

Answer: The distance is |x2 - x1|