So I'm trying out Excel's Trendline feature for charts and I'm wondering how to interpret it. I plotted out Sales Conversion Rates for 2 years and added a Linear Trendline in Excel. I read that the closer the r squared value is to 1 the more accurate the trend is. The r squared values I'm getting are all close to 0. Does that mean the trend of the line is not accurate? How do I interpret r squared value? Thanks.