Question

Please Help Me

Answer 1

Whats the question?

Answer 2

The amount in Ebony’s bank account B(d) is a function of the number of days d since she opened the account. The graph shows segments representing her day-by-day bank balance. Although there are no labeled tick marks on the graph, you can answer the questions by using the additional given information as well as your general knowledge of graphs of functions.



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.

Answer 3

please, I need to know the graph

Answer 4

Just a sec

Answer 5

the graph is in the doc

Answer 6

I see, thanks!
Since the min value of the balance is $0, and the max value of such balance is $400, then we can apply this formula:
\(range=max\;value-min\;value=...?\)

Answer 7

$400-$0=400

Answer 8

that's right!

Answer 9

since the balance variation occurs inside three weeks, then I think that the requested domain, is just such interval of three weeks of time

Answer 10

Like 400 times 3?

Answer 11

no, no, I meant this:
\(domain= 3\; weeks = 21\; days\)

Answer 12

please, keep in mind we have a function of number of days, namley:
\(balance=f(days)\)

Answer 13

namely*

Answer 14

domain equals 3 weeks times 21 days

Answer 15

no, no, we have this:
\(domain= 3\;weeks\) or \(domain=21\;days\)

Answer 16

so both are equaled to the domain

Answer 17

yes!

Answer 18

oh okay, i get it

Answer 19

:)

Answer 20

Thanks