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

Domain = $\mathbb{R}$ Range = $\{y\ |\ y \geq 1\}$, or $[1,\infty)$
If the function is described by a graph, then the domain is the set of all first coordinates of the points on the graph. The range is the set of all second coordinates. The first coordinate of a point of the graph can be any real number. Domain = $\mathbb{R}$ The second coordinates are real numbers, 1 or greater than 1 Range = $\{y\ |\ y \geq 1\}$, or $[1,\infty)$