Question 6 4 pts Suppose that you would like to model the relationship between a single quantitative dependent variable (y) and a single quantitative independent variable (x1). Suppose that you believe curvature exists in the relationship between 1 and y based on a scatterplot of x1 versus y. Which method is most appropriate for testing for curvature in the relationship between 1 and y (given the information above)? Individual t-test for the constant term Subset (partial) F-test for curvature Individual t-test for the first-order term (x1) O Subset (partial) F-test for interaction Individual t-test for the curvature term (x1-squared)