Answer:
Be descriptive, timely, brief, useful, and empathetic.
Step-by-step explanation:
An effective response to co-worker for approaching the supervisor for pay-raise must be 'descriptive, timely, brief, useful, and empathetic.' Being descriptive will ensure that you narrate each and every detail(how(manner), when, reasons which may validate his point, etc.) which may prove beneficial for him in discussing the case with the supervisor. Secondly, the response must not take too long as it may give an impression of ignorance to him. The response must be precise, beneficial, and emphathetic showing that you can understand his situation and thus, giving him the most helpful advice. These characteristics will not only make your response effective but leave a positive vibe on the co-worker as well.