Which of the statements about the y-axis are true?

i. the y-axis is a vertical number line that passes through the origin.
ii. the y-axis intersects the x-axis at the point (0 , 0).
iii. the y-axis is the first coordinate in an ordered pair that describes the vertical distance from the origin.
iv. the y-axis is a horizontal number line that passes through the origin.
i only
ii and iv
iv only
i and ii