When the domain and the codomain are sets of real numbers, each such pair may be thought of as the Cartesian coordinates of a point in the plane.
Agud was tabarat əd zaboten aqalnat ayertayan ən haditan atiwasanen, hak wa səsin adobat adiqil atiwagan sund koordonnéetan ən kartésien ən tatbiqet dǎɣ atiwanan.