#### Answer

See results below.

#### Work Step by Step

Use the given graph, we have:
a. the domain of f is $(-\infty, \infty)$
b. the range of f is $(-\infty,4]$
c. the x-intercepts are $x=0, 4$
d. the y-intercept is $y=0$
e. the interval where f is increasing is $(-\infty,2)$
f. the interval where f is decreasing is $(2,\infty)$
g. the number at which f has a relative maximum is $x=2$
h. the relative maximum of f is $y=4$
i. $f(-1)=-5$