## College Algebra (11th Edition)

Domain: $(-\infty, +\infty)$ Range: $\left\{3\right\}$ Refer to the image below for the graph.
$f(x)=3$ The y-intercept can be found by letting x=0. Here, $f(x)=3$ Hence, the y-intercept is 3, therefore we plot (0, 3) However, it is a constant function, therefore we have to draw a vertical line. The domain is $(-\infty, \infty)$ as the function will "work" for all real x-values. (We can see the domain on the graph too. As for every x-value we will find a corresponding point on the graph.) The range is ${3}$ as we will get only one real y-values after substituting all real x-values in the function. (We can see the domain on the graph too. For only one y-value will we find a corresponding point on the graph.)