Consider the Following to Answer the Question(s) Below

Consider the following to answer the question(s) below:
To determine whether the tip left at the end of a meal is related to the size of the total bill at their restaurant, Chez Michelle, data were gathered for 10 customers. The data and summary statistics are shown below.

-For each of the following scenarios, indicate which is the predictor variable and which is the response variable.
a. A study examined consumption levels of oil and carbon dioxide emissions for a sample of municipalities.
b. Data were collected on job performance rating and hours of training for a sample of employees at a telecommunications repair facility.
c. Salary data as well as years of managerial experience were collected for a sample of executives in the high tech industry.