## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

domain: $(-\infty, +\infty)$ range: $(-\infty, +\infty)$
The domain is the set that contains all the x-values of a function. The range is the set that contains all the y-values of a function. The given equation is defined for any real number $x$. Thus, the domain is the set of all real numbers. In interval notation, the domain is $(-\infty, +\infty)$. Since the value of $x$ can be any real number, then substituting any value of $x$ gives a real number. Thus, the range is the set of all real numbers. In interval notation, the range is $(-\infty, +\infty)$.