Abscissa and ordinate is the distance between the projection and the origin of the axis, and whose sign is given by the location on the projection relative to the origin (before: negative; after: positive). Usually these are the horizontal and vertical coordinates of a point in a two-dimensional rectangular Cartesian coordinate system. The terms can also refer to the horizontal and vertical axes respectively (typically "x"-axis and "y"–axis) of a two-dimensional graph. An ordered pair consists of two terms—the abscissa (horizontal, usually "x") and the ordinate (vertical, usually "y")—which define the location of a point in two-dimensional rectangular space. Though the word "abscissa"
Graph of a function should be taken into account. The graph of a function on its own doesn't determine the co-domain. It is common to use both words, function and graph of a function, since even if considered the same object, they indicate viewing it from a different angle. Given a mapping formula_1, in other words a function formula_2 together with its domain formula_3 and co-domain formula_4, the graph of the mapping is the set which is a subset of formula_6. The graph of the function formula_2 is the same set formula_8, which is, in the abstract definition of a function, the same as