# domain

The domain is the set of values of the independent variable, *x*, for which the function *f*(*x*) is defined; the set of values of the dependent variable
is called the range. For example, let the
function by *y* = *x*^{2}, with *x* restricted
to 0, 1, 2, 3, -3, and -5. Then *y* takes the values 0, 1, 4, 9,
and 25 respectively. The domain is [0, 1, 2, 3, -3, -5] and the range is
[0, 1, 4, 9, 25].