Since x co-ordinates are constant, answer has to be difference in y co ordinates therefore the answer is 4
See it is < and not ≤ so we don't include -4
put a circle around -4 but don't shade it in
to get there, move 4 units left from 0
then we see x is less than -4
so shade to the left of the circle
The only consistent right answer will be B.
<span />
