Answer
Graph of a function
Domain is $(-\infty, \infty)$
The range is $(-\infty, \infty)$
Work Step by Step
This is the graph of a function because a vertical line can intersect it in only one point which means for each $x$-value there is exact one $y$-value.
The domain is $(-\infty, \infty)$. The range is $(-\infty, \infty)$.