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Mathematics 8 Online
OpenStudy (anonymous):

Can anyone help me please?

OpenStudy (anonymous):

Write an exponential function that could model the information in this graph.

OpenStudy (anonymous):

OpenStudy (anonymous):

so this is what i would write as the function?

OpenStudy (anonymous):

how would i go about finding that?

OpenStudy (anonymous):

my text book skipped out on this section

OpenStudy (unklerhaukus):

wait a minute

OpenStudy (unklerhaukus):

I think the base is \(2\) not \(e\).

OpenStudy (anonymous):

well the coordinates there are (1,2)

OpenStudy (anonymous):

i am just confused because my text book completely skipped the explanations and i have to take a test on it :/

OpenStudy (unklerhaukus):

(0,1) , (1,2) (2, 4,) (3, 8) y(0)=1 y(1)=2 y(2)=4 y(3)=8

OpenStudy (anonymous):

ok and this information would be plugged in where?

OpenStudy (unklerhaukus):

can you work out the pattern 1,2,4,8,

OpenStudy (anonymous):

this i understand....

OpenStudy (unklerhaukus):

sorry , i was way off before , can you work out the function from the pattern \[y(x)=\]

OpenStudy (anonymous):

i believe so... the information doesn't say that you have to do it any specific way

OpenStudy (unklerhaukus):

so what is the pattern ?

OpenStudy (anonymous):

the only thing it says is to write the exponential function that can model the graph....

OpenStudy (anonymous):

the pattern is that you increase the exponent and get a higher number/

OpenStudy (unklerhaukus):

1,2,4,8,...,...,

OpenStudy (anonymous):

yes... then it would continue 16, 32... so on and so forth right?

OpenStudy (unklerhaukus):

yes this patten can be representes as : \[y(x)=\quad\dots\]

OpenStudy (anonymous):

im a bit lost there

OpenStudy (unklerhaukus):

if the pattern was 4,4,4,...,..., \[y(x)=4\] _________ if the pattern was 1,2,3,...,..., \[y(x)=x\] _________ if the pattern was 1,8,27,...,..., \[y(x)=x^3\]_________

OpenStudy (anonymous):

ok i follow... lemme see if i can figure out the pattern in this one

OpenStudy (anonymous):

\[y(x)=x^2\]

OpenStudy (anonymous):

right?

OpenStudy (unklerhaukus):

this equation \[y(x)=x^2\] has the points \[y(0)=0^2=0\qquad (0,0)\]\[y(1)=1^2=1\qquad (1,1)\]\[y(2)=2^2=4\qquad (2,4)\]\[y(3)=3^2=9\qquad (3,9)\] gives this pattern \(1,4,9,16,25,...\)

OpenStudy (unklerhaukus):

but we want the pattern \(1,2,4,8,16,32,...,...\)

OpenStudy (anonymous):

ok let me see ....

OpenStudy (anonymous):

don't really know... :(

OpenStudy (anonymous):

maybe \[y(x)=x^4\]

OpenStudy (unklerhaukus):

try 2 as the base

OpenStudy (anonymous):

y(x) = 2

OpenStudy (unklerhaukus):

\[y(1)=2^1=2\]

OpenStudy (unklerhaukus):

\[y(0)=2^0=1\]

OpenStudy (unklerhaukus):

\[y(2)=2^2=\]

OpenStudy (anonymous):

im lost again :( I'm so sorry!

OpenStudy (unklerhaukus):

\[y(3)=2^3=\]

OpenStudy (anonymous):

So the base stays at 2? the x is the only thing that changes

OpenStudy (unklerhaukus):

\[y(x)=?\]

OpenStudy (anonymous):

is it \[y= (2/e) e ^x\]

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