Amanda is putting money into a checking account. Lety represent the total amount of money in the account (in dollars). Let x represent the number of weeks Amanda has been adding money. Suppose thatx and y are related by the equation 550 + 20x = y. 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 is the change per week in the amount of money in the account? $D What was the starting amount of money in the account? $D