#interactions

Question 1: Single choice

Two independent features $X_1$ and $X_2$ are uniform on $[-2, 2]$ , and the target is $y = X_1 X_2$ . A model learns this function almost exactly. What do the partial dependence plot (PDP) and the permutation importance of $X_1$ show?

A flat PDP, but a high permutation importance1
A steep PDP and a high permutation importance2
A flat PDP and a permutation importance near zero3
A U-shaped PDP and a permutation importance near zero4

Timed test