For each pair of variables, decide whether there is: • a very weak or no relationship

• a strong relationship that is not a causal relationship

• a causal relationship


Explain your reasoning

1. number of snow plows owned by a city and mitten sales in the city

2. number of text messages sent per day by a person and number of shirts owned by the person

3. price of a pizza and number of calories in the pizza

4. amount of gas used on a trip and number of miles driven on the trip