Tony is putting money into a checking account. Let represent the total amount of money in the account (in dollars). Let represent the number of Tony has been adding money. Suppose that and are related by the equation . Answer the questions below. Note that a change can be an increase or a decrease. For an increase, use a positive number. For a decrease, use a negative number. What was the starting amount of money in the account? s What is the change per in the amount of money in the account?