Question

Madison deposited $18 in a savings account that earns 2.5% simple interest. Which graph represent this scenario

Answer 1

the graph that says Madison? =)

Answer 2

Ok i don't how to upload the graph but can I tell you the points? @jdoe0001

Answer 3

see the blue button that says [Attach File], next to the [Draw] button?

Answer 4

yes i do

Answer 5

Can you please give me one minute until i upload the graph @jdoe0001

Answer 6

well... we know her original amount is $18 => principal
we know the interest rate is 2.5% => \(\bf \frac{2.5}{100}\implies 0.025\)

so.... to find how much she did after "t" years, just get the values

say for example after \(\bf A=P+Prt\implies A=P(1+rt)\qquad t=years\\ \quad \\
\begin{array}{ccllll}
years&Amount\\
\hline\\
{\color{red}{ 1}}&A=18[1+0.025\cdot {\color{red}{ 1}})]\\
{\color{red}{ 2}}&A=18[1+0.025\cdot {\color{red}{ 2}})]\\
{\color{red}{ 3}}&A=18[1+0.025\cdot {\color{red}{ 3}})]\\
{\color{red}{ 4}}&A=18[1+0.025\cdot {\color{red}{ 4}})]\\
{\color{red}{ 5}}&A=18[1+0.025\cdot {\color{red}{ 5}})]\\
...
\end{array}\)

Answer 7

I'm looking for the interest rate so I use the same formula?

Answer 8

well, you want to know how much is her total for each year, or A= Amount of balance

so that'd be \(\bf A=P(1+rt)\)

Answer 9

So the first year is 18.45?

Answer 10

yeap

Answer 11

2 => 18.9
3 => 19.35 and so on

Answer 12

Ok so far I get it perfectly but I don't how see with the graphs?

Answer 13

I'm sorry with graphs

Answer 14

what are you calculating?

Interest I varies directly with the time
Interest I= PRT
when t = o P. principal is 18

Answer 15

try say 2, 6 and 10 for the years

Answer 16

see if you can match up with one of the choices

Answer 17

Ok

Answer 18

http://assets.openstudy.com/updates/attachments/5307e28ee4b00fb1e2381da6-hope123-1393026791922-01_16.gif

Answer 19

Yeah I think the one that makes more sense is graph 3 @jdoe0001

Answer 20

yeap, the last graph you posted

Answer 21

Yes thank you so much @jdoe0001