Write the coordinates of a point which lies on the y-axis and is at a distance of y units below the x-axis.
The point is on the y-axis and is of the form (0, a) and since the distance is y units below the x-axis the coordinates are (0, -y).
A point lies on x-axis at a distance of 9 units from y-axis. What are its coordinates? What will be the coordinates of a point if it lies on y-axis at a distance of -9 units from x-axis?