is a set that describes the union of two or more subsets, all the overlapping numbers are listed only once, even though they appear in both (or more) of the subsets.
the set of possible y-values (values of the dependent variable) for a function.
the axis of symmetry in a hyperbola that joins the vertices of the two branches.
two numbers (x; y) that indicate the position of a point in the Cartesian...
a group of laws that govern the calculations involving numbers or variables with exponents (...