The '''Y-axis''' is the [[vertical]] axis on a [[coordinate plane]], as opposed to the [[horizontal]] axis, or [[x-axis]]. The [[point]] at which a [[line]] crosses the y-axis is referred to as the [[y-intercept]]. The [[x-intercept]] is defined as infinity. | The '''Y-axis''' is the [[vertical]] axis on a [[coordinate plane]], as opposed to the [[horizontal]] axis, or [[x-axis]]. The [[point]] at which a [[line]] crosses the y-axis is referred to as the [[y-intercept]]. The [[x-intercept]] is defined as infinity. |