Ebony kept her bank account open for only 3 weeks, and the graph shows the entire 3 weeks. During that time, her greatest balance was $400.
(a) Give the domain and range of the function.

(b) Give an estimate to the nearest hundreds for . Explain how you determined your estimate and tell what means in context of the situation.

(c) Ebony’s bank balance first reached $0 on Day 12. How would you show that information in function notation?

(d) Ebony’s bank balance remained at $0 from Day 12 through Day 15. As you count segments from the left, which segment on the graph1, 2, 3, 4, 5, or 6 represents that information? Explain how you know.