Explore feature relationships

Let's do some exploratory analysis. You are already familiar with the retinol dataset. It stores the information on the relationship between different factors (background information, clinical data) and the levels of retinol (plasma retinol) and beta-carotene (plasma B-carotene) in blood plasma. Low levels of these compounds were reported to be associated with higher risk of cancer.

Which numeric features may have strong linear relationship to the plasma retinol feature?

The matplotlib.pyplot module is already imported as plt.