Trendline equation is a formula that finds a line that best fits the data points. R-squared value measures the trendline reliability - the nearer R2 is to 1, the better the trendline fits the data.
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Note The trendline formula is used for an XY Scatter chart. This chart plots both the X axis and Y axis as values.
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Line, Column, and Bar charts plot only the Y axis as values. In these chart typesthe X axis is plotted as only a linear series, regardless of what the labels actually are.
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Therefore, the trendline will be inaccurate if it is displayed on these types of charts. This behavior is by design.
Cause Microsoft Excel plots trendlines incorrectly because the displayed equation may provide inaccurate results when you manually enter X values. For appearance, each X value is rounded off to the number of significant digits that are displayed in trend line is not working chart.
This behavior allows the equation to occupy less space in the chart area.
However, the accuracy of the chart is significantly reduced. This can cause a trend to appear to be incorrect.
Workaround To work around this behavior, increase the digits in the trendline equation by increasing the number of decimal places that are displayed. To do this, follow these steps: In the chart, select the trendline equation.
On the Format menu, click Selected Data Labels. Select the Number tab, and then select Number in the Category list.
In the Decimal places box, increase the number of decimal places to 30 so that you can see all the decimal places. Select OK. Still need help?
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