Question

The graph of a function f(x) is shown below: plot ordered pairs negative 1, negative 3 and 0, 1 and 1, 2.2 and 2, 3

Answer 1

we have the points

$A(-1,-3)\\B(0,1)\\C(1,2.2)\\D(2,3)$      

Using a graphing tool

see the attached figure  

the domain is the interval---------> $[-1,2]$

$-1 \leq x\leq 2$      

the range is the interval--------> $[-3,3]$

$-3 \leq y\leq 3$  

therefore

the answer is the option D

integers from  $-1 \leq x\leq 2$