Hi, I need help with my statistics assignment. I don't understand anything!

This data set provides the body mass index (BMI) and self-rated physical health scores (PCS-12) for 23 adult (18 years of age) study participants in three groups: Mennonite farmers (MENNONITE), Non-Mennonite farmers (NON-MENNONITE), and urban residents (URBAN). PCS-12 scores can range from 0 to 100, with higher scores representing better self-rated physical health. Assume a 95% confidence level for all statistical analyses.

Suppose you are interested in the relationship between BMI and PCS-12 in the participants. Specify the dependent variable and independent variable that you could use in a statistical analysis aimed at exploring this relationship, and explain your choice.