For this case what you should do is evaluate values of x in the function and verify that they meet the result of f (x) shown in the graph.
f (x) = - lxl-2
notice that
f (3) = - l3l -2 = -5
f (-3) = - l-3l -2 = -5
Both comply with the value of f (x) shown in the third graph from left to right.
answer
third graph from left to right.