Answer: Correlation
Explanation:
In statistics, Correlation between two quantities tells that a relationship exists between those variables. where as causation tells a relationship where one quantity is affected by the other.
Given statement : The number of minutes you can talk on a cell phone decreases as the phone's battery charge decreases.
It shows there is a correlation between the number of minutes of talk and phone's battery.
But there is not any evidence of causation because by the decrease in the phone battery the number of minutes to talk couldn't be affected, its actually varies person to person.