e-dimensional space, the Cartesian coordinate system is based on three mutually perpendicular coordinate axes: the x-axis, the y-axis, and the z-axis, illustrated below. The three axes intersect at the point called the origin.______________________________________________________________Since EVERY point on the x - axis has no distance (zero distance) from the x - axis, THEREFORE, the y - coordinate of every point LYING on the x - axis is always zero. Thus, the coordinates of any point on the x - axis are of the FORM (x, 0), where x is the distance of the point from the y - axis.______________________________________________________________ The core concept is that on a 2-dimensional (Euclidean) plane, any point can be represented by a pair of real numbers, using two non-parallel straight lines. The point where these two non-parallel reference lines meet is termed the origin of the reference axis. ... Such axes are called Rectangular Axes.___________________________________________________________