Final answer:
The situation described, where the client increased cigarette consumption rather than decreasing it, is an example of a negative evaluation.
Step-by-step explanation:
The question presents a scenario where a client and a nurse agree on a smoking reduction plan, specifying that the client will smoke one less cigarette each week until he reaches one pack per day. Given that the client is now smoking two and a half packs per day after three weeks, this behavior does not align with the goal of reducing cigarette consumption. Therefore, this situation is an example of a negative evaluation, as it indicates that the client's smoking habit has increased rather than decreased, contrary to the agreed-upon plan for smoking cessation.