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The Variables Tab

You can use the Variables tab to specify the variables for the Polynomial Regression analysis.

The Variables tab is shown in Figure 20.3. The Y variable is the response variable. The dialog box supports a single X (explanatory) variable. To analyze a response that depends on multiple explanatory variables, you can use the Linear Regression (Chapter 21, "Model Fitting: Linear Regression") or the Generalized Linear Models (Chapter 24, "Model Fitting: Generalized Linear Models") analysis.