Answer
The range of the function is $(-\infty, +\infty)$.
Work Step by Step
RECALL:
The range is the set of all the y-values of a function..
Notice that the function's graph covers all the y-values from the bottom to the top..
This means that the y-values covered by the function is the set of all real numbers.
Thus, the range of the function is:
$(-\infty, +\infty)$