Question

What can you say about the position of the points $(1,2),(1,3),(1,-4),(1,0)$ and $(1,8)$.

Answer 1

It can be seen from the given points $(1,2),(1,3),(1,-4),(1,0)$ and $(1,8)$, that they all have same abscissa ie. $x$-coordinate but different ordinate ie. $y$- coordinate.

Hence, they form a straight line which is parallel to the $y$ -axis. Same can be observed with the help of a graph.