Question

What is the function

1) -3 <_ x < 1
2) -3 < x <_ 1
3) -4 < y <_ 2
4) -4 <_ y < 2

Answer 1

As the point (-3,-4) has an open circle on it , So we do not include this point in our answers .

while the other point (1,2) has a closed circle on it , so we include it in our answer .

So the two answers should be

`-3<x\leq 1` and
`-4<y\leq 2`

i.e. 2) and 3) are the correct answers