axis
axis (eje)
the line along the side or bottom of a graph that shows what is measured and in what units.
Example
The bottom axis shows years, and the side axis shows the number of riders. (Read both axes before the bars.)
In Spanish
axis (eje) — la línea al lado o en la parte de abajo de una gráfica que muestra qué se mide y en qué unidades.
The bottom axis shows years, and the side axis shows the number of riders. (Lee los dos ejes antes de mirar las barras.)