We can add the R-squared value as a measure of how close our data points are to the regression line. Check the option for “ Display Equation on chart ”.Įxcel will instantly add the best fit curve for our data, and display the polynomial equation on the chart.In the Format Trendline window, select Polynomial and set the Order to “2”.Click Add Chart Element > Trendline > More Trendline Options.A Scatter plot will be created, and the Design tab will appear in the toolbar under Chart Tools.Click Insert tab > Scatter button > Scatter chart.Select the data for our graph, B2:C17, which is a tabular result of the relationship between temperature and volume. In order to fit a curve to our data, we follow these steps: Final result: Curve fitting How to fit a curve Fortunately, Excel allows us to fit a curve and come up with an equation that represents the best fit curve.įigure 1. When we have a set of data and we want to determine the relationship between the variables through regression analysis, we can create a curve that best fits our data points.
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