The amount of money in Toni's savings account after x weeks is described by the function f(x) = 5x + 20. Which best interprets this function?

1.Toni's savings account started with $5 and increased by $20 each week.
2.Toni's savings account started with $20 and increased by $5 each week. 3.Toni's savings account started with $20 and decreased by $5 each week.
4.Toni's savings account started with $5 and decreased by $20 each week.