Answer
(a) $\{x|x=all\ real\ numbers\}$.
(b) $(0,3)$.
(c) See graph.
(d) $\{y|y\ge1\}$
(e) continuous
Work Step by Step
(a) Based on the given piece-wise function, we can find the domain as $\{x|x=all\ real\ numbers\}$.
(b) We can locate the x-intercept(s) (let y=0) as $none$, y-intercept(s) (let x=0) as $(0,3)$.
(c) See graph.
(d) Based on the graph, we can find the range as $\{y|y\ge1\}$
(e) We can see that $f$ is continuous on its domain.
