Final answer:
To do a linear trend interpolation in Excel, enter data, create a scatter plot, and add a linear trend line. Display the linear equation on the chart to interpolate values within the data range.
Step-by-step explanation:
To perform a linear trend interpolation in Excel, the first step is to enter your data into the spreadsheet. Then, create a scatter plot of your data by selecting the appropriate chart type. Once you have displayed the scatter plot, you can use Excel's built-in functions to add a linear trend line.
To add a linear trend line, follow these steps:
- Click on any data point in the scatter plot.
- Go to the 'Chart Tools' or 'Chart Design' tab.
- Choose 'Add Chart Element', then 'Trendline', and select 'Linear'.
- To display the equation of the line on the chart, select the 'More Trendline Options' and then check the 'Display Equation on chart' option.
ItalicsUsing the linear regression equation added to the chart, you can now interpolate or predict values within the range of your data. Remember to check the goodness of fit, usually indicated by the R-squared value, to assess how well the trend line represents your data.