rafael is putting money into a savings account. he starts with $650 in the savings account, and each week he adds $40.

let S represent the total amount of money in the savings account (in dollars), and let W represent the number of weeks rafael has been adding money. write an equation relating S to W. then use this equation to find the total amount of money in the savings account after 16 weeks.

equation: ?

total amount of money after 16 weeks: $ ?