On a graph, the vertical axis is called the y-axis, and the horizontal axis is called the x-axis.
The x– and y–axes intersect with each other to form a coordinate plane (also called a Cartesian plane). The Cartesian plane is used to plot points, lines, and curves in algebra, geometry, and calculus.
Each point on the coordinate plane is represented by an ordered pair of numbers displayed as (x,y), where x is the horizontal position (measured along the x-axis), and y is the vertical position (measured along the y-axis).
Scribbr’s free Grammar Checker will ensure you’re using the correct form of the word axis.