You are comparing the Y values for multiple points with different X values in the same series. You are looking for trends and fine differences. I am comparing

You are comparing the Y values for multiple points with different X values in the same series. You are looking for trends and fine differences. I am comparing the Y values for multiple points with the same X values in different series. I'm only looking for course differences. For my purpose, it makes sense for the scale to start at zero. At a glance, the week of April 12, 2020 looks like it has four times as many deaths as any other year since 2015. In reality, it has roughly 1.5x as many. That's still a huge difference, but I had to check the scale and do some quick mental calculations to figure that out - which is more than I would have had to do if the graph's vertical scale started at zero. I'm not arguing that all graphs must start their scales with zero. I'm not even saying that this is a bad graph. It's just not as effective for the kind of analysis I want to use it for.