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

What is the domain of f(x)?
A. integers from −1 < x < 2
B. integers from −3 < y ≤ 3
C. integers from −3 ≤ y < 3
D. integers from −1 ≤ x ≤ 2

Answer 1

Just took the exam and it was option D :)

Answer 2

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`