In a quarterly review there's a year-to-date cumulative spend line chart that rises every month from January to May, and the boss says the business looks healthy. You check the monthly numbers: January 1.0 million, February 1.1 million, March 1.05 million, April 0.95 million, May 0.85 million. How do you read that chart, and how would you change it?

季度会上有张年初至今累计消费的折线图，1到5月一路往上，老板说业务很健康。你查了每月消费：1月100万、2月110万、3月105万、4月95万、5月85万。你怎么看这张图？会怎么改？