You can use this formula and the known values to compute predicted values. That’s most of what we just talked about. But you can also plot a regression line to show how well the scores (what you are trying to predict) actually fit the data from which you are predicting. Take another look at Figure 16.2, the plot of the high school–college GPA data. It includes a regression line, which is also called a trend line. How did we get this line? Easy. We used the same charting skills you learned in Chapter 5 to create a scatterplot; then we selected Add Fit Line in the SPSS Chart Editor.
