Question

the ... axis is vertical in the coordinate plane. options: y, x, z, none of the above

Explanation:

In a 2 - dimensional coordinate plane, the \( x \) - axis is horizontal (it runs left - right) and the \( y \) - axis is vertical (it runs up - down). The \( z \) - axis is used in 3 - dimensional space, and for a 2 - dimensional coordinate plane, the vertical axis is the \( y \) - axis. So the correct option is the one with \( y \).

Answer:

A. \( y \)