Keiko is putting money into a checking account. let y represent the total amount of money in the account (in dollars). let x represent the number of weeks keiko has been adding money. suppose that x and y are related by the equation =20x+550=y .
* 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?

what is the change per week in the amount of money in the account?