Trend Analysis
Products first trendline
The R-squared value, which tells you how closely your trendline follows your data, appears on the chart. With a linear trendline, the value is .8351. As you can see by the chart, the trendline doesn't follow the data very closely because the sales rise rapidly in the first few years and then start to level out. A straight-line (linear) trendline that includes the rapid-growth early years may overestimate future sales.
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