Let's analyze each graph.
Graph W is actually decreasing when x<0, so it is incorrect.
Graph X increases when x<0 and not when x≥0, so that makes it a possible answer.
Graph Y decreases when x<0, so it is incorrect.
Graph Z increases when x<0, but it is also increasing when x≥0, so Graph Z is incorrect.
Graph X is the only correct answer.
Have an awesome day! :)
