![]() It can now be used to make certain predictions.įor example, suppose the 1 mole sample of helium gas is cooled until its volume is measured to be 10.5 L. The graph contains a visual representation of the relationship (the plot) and a mathematical expression of the relationship (the equation). By graphing the five measured values, a relationship is established between gas volume and temperature.whether the fit of the line to the data is good or bad, and why.the equation of the best-fit trendline to your data.Then record the following information on your report: Print out a full-sized copy of your prepared graph and attach it to your report.You must judge the quality of the fit and the suitability of this type of fit to your data set. Note that the program will always fit a trendline to the data no matter how good or awful the data is. Generally, R 2 values of 0.95 or higher are considered good fits. ![]() The closer the R 2 value is to 1, the better the fit. The R 2 value gives a measure of how well the data is fit by the equation.
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