`x` and `y` axis
The `x` axis is the horizontal axis and the `y` axis is the vertical axis.
Would you feel safer balancing the egg on the `x` or the `y`? We think you would prefer balancing the egg on X's horizontal expanse.
X is a cross, so the `x` axis is across.
`x` is a cross, so the `x` axis is across. Therefore, the `y` axis is vertical.
All graphs have an `x` axis and a `y` axis.
Both the `x` axis and `y` axis of a graph may also show negative values, as in the one above.