| − | The '''y-axis''' is the [[vertical]] axis on a two-dimensional [[Cartesian]] [[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 '''y-axis''' is the [[vertical]] axis on a two-dimensional [[Cartesian]] [[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]]. Like many concepts, it was invented by a [[Christian]]. |