(a) domain: $[-1,4]$, range: $[-1,3]$ (b) increasing: $(-1,1)$ and $(2,4)$, decreasing:$(1,2)$
Work Step by Step
(a) The domain consists of the values that $x$ takes on and the range consists of values that $y$ takes on. We see from the graph that the domain is: $[-1, 4]$ and the range is: $[-1, 3]$. (b) We see from the graph that the function is increasing for $x$ intervals $(-1,1)$ and $(2,4)$ and decreasing for $x$ interval $(1,2)$.