Justin has a savings account. He started with $25 in his account.

He deposits $10 into the account each
week.

Let 'b' represent the amount Justin has in the bank account after 'w' weeks.
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Which statement is correct?

A. The variable W is dependent on the variable B.

B. The variable B is dependent on the variable W.

C. Both B and W are independent variables.

D. Both B and W are dependent variables.