I have a set of data, which I charted and then used the 'add trendline' tool to get a decent 2nd order poly. fit with the equation: y = -3E-39x^2 + 4E-19x + 3.4212 However, when I type this equation ...
Catherine Falls Commercial/Getty Images Linear regression ... in Excel by highlighting the data and charting it as a scatter plot. To add a regression line, choose "Add Chart Element" from the "Chart ...
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