Answer:
k = 2
Explanation:
in such a case we look immediately at the cases y = 0 and/or x = 0
only if that does not lead us to an answer, do we need to look further.
y = 0, that means according to the graph that x = -2.
so, we have
0 = |x + k| = |-2 + k|
that can only be the case, if k = 2
and we are done.