rewrite this answer:
The relationship between the variables in this scenario is a function because for each given week, there is only one corresponding value for the money left in the account. It is determined by subtracting the amount spent per week from the initial amount of money in the account.
For example, in the first week, if you spend $30, the money left in your account would be $240 - $30 = $210. In the second week, if you spend another $30, the money left in your account would be $210 - $30 = $180.
Thus, for each week, there is a unique and deterministic value for the money left in the account, satisfying the definition of a function.
In this scenario, the relationship between the variables is a function. This is because, for each given week, there is a single corresponding value for the money left in the account. This value is determined by subtracting the amount spent per week from the initial amount of money in the account.
For instance, let's consider the first week. If $30 is spent, then the money left in the account would be $210 ($240 - $30). In the subsequent week, if another $30 is spent, the money left in the account would be $180 ($210 - $30).
Therefore, for every week, there is a distinct and predictable value for the money left in the account, satisfying the definition of a function.