Use the Standard Least Squares personality of the Fit Model platform to fit a cubic polynomial model to bivariate data.
1. Select Help > Sample Data Folder and open Growth.jmp.
2. Select Analyze > Fit Model.
3. In the Select Columns list, select ratio and click Y.
4. Type 3 in the text box next to Degree.
5. In the Select Columns list, select age.
6. Select Macros > Polynomial to Degree.