The x-axis is the horizontal line on a coordinate plane that represents all possible x-values. It serves as reference for locating points in relation to their x-coordinates.
The vertical line on a coordinate plane that represents all possible y-values.
Origin: The point (0, 0) where the x-axis and y-axis intersect on a coordinate plane.
Quadrants: The four regions formed by the intersection of the x-axis and y-axis on a coordinate plane.