Testing for a non-linear (U-shape) relationship with 2 metric variables

#1
Hi there,

I have set up a hypothesis that I know want to test in SPSS stating that the relationship between X en Y is non-linear and takes a U-shape. Both the dependent as well as the independent variable are metric. How would I do this in SPSS?

Thank you very much.

Sophie
 

Dason

Ambassador to the humans
#2
Fit a quadratic regression and test if the coefficient on the squared term is significant in the model?