Figure 7.4 Adding Regression Line Using the Chart EditorWhen you do these commands, there will be default values fora coefficient and intercept. The coefficient is the number multiplied by x and the intercept is added to it. We used the coefficient and slope from our regression results. Figure 7.5 A Scatterplot with Predicted Regression Line After you run these commands, you will observe that SPSS creates a chart that looks fairly similar to the one represented in Figure 7.5. The line we inserted represents the linear regression model, and contains the predicted values of percentage of births attributed to teenage mothers for every value of the poverty rate. Although the line extends far to the left and right of the data, remember not to use the predicted values that fall beyond the scope of the data possessed.
Chapter 7 • Modeling Relationships of Multiple Variables with Linear Regression 171
