1. Remove variables from the Red Bull model based on:

• Does it improve adjusted R2?
• Does it have a insignificant p-value?
• Is it associated with the response by itself?
• Is it strongly associated with another explanatory variables? (If yes, then including both may be redundant) Does common sense say it should contribute to the model?

2. What would you eliminate from the model?

3. Which marketing channels would you prioritize and why?