Question

is anybody good in statics
here

Answer 1

u should just type ur question

Answer 2

do u understand statics

Answer 3

yes

Answer 4

ok her it is

Answer 5

thecolum for years is 1960, 1973, 1986, 1995, 2002, 2003

and the subway fares is 0.20, 0.40, 1.10, 1.30, 1.45, 1.90

I have found out this is an exponential model.

Now here is the question? Using the best model, the projeced subway fare in the year 2013 is how much

Answer 6

do you undestand this question

Answer 7

are this all the data?

Answer 8

yes

Answer 9

u said that this is on an exponential function?

Answer 10

yes

Answer 11

ok just give me a few minutes to write the answer

Answer 12

ok

Answer 13

here is a very good toturial that can help u make an eqztion for ur data and then u could use that to answer ur question

i will show the steps but just take a look at this and see if u understand it

http://wiki.answers.com/Q/How_table_of_values_can_be_an_exponential_function

Answer 14

meant equation*

Answer 15

I get is but Can you still he lp me becuse I am a little confused

Answer 16

ok where are u stuck

Answer 17

on how to get started

Answer 18

can you show mw once so I know how to do it

Answer 19

please

Answer 20

ok

Answer 21

are sure there are no missing info just check plz

Answer 22

I am positive. Here are the directions


Use the Year/subway fare data shown. Let X Represent the year, with 1960 coded as 1, 1973 coded as 14, and so on. Let Y represent the Subway Fare. Does the model appear to be a good model. Using the best model, find the projeced subway fare in the year 2013.

Answer 23

when it says "and so on" do u have a picture that u can draw to clarify some things

Answer 24

because that is where the trick is

Answer 25

the R^2 or the coefficient of determination is .960

Answer 26

see yeah I know it is very tricky, do you undertand still

Answer 27

56
toxicsugar22






0thecolum for years is 1960, 1973, 1986, 1995, 2002, 2003

and the subway fares is 0.20, 0.40, 1.10, 1.30, 1.45, 1.90

I have found out this is an exponential model.

Now here is the question? Using the best model, the projeced subway fare in the year 2013 is how much

Answer 28

ok so how did find out about the R

Answer 29

by the TI 83 Graphing Calculator, do you have one

Answer 30

yes

Answer 31

ok do you still not get how to do it

Answer 32

ok then use it to find A

Answer 33

just like the other website says

Answer 34

ok how would I do that, is it like .40/.20

Answer 35

can you please help me

Answer 36

ok look i think i get it now

subtitue the data that u have with 1,14,14,8,2

and then use the same y

0.20, 0.40, 1.10, 1.30, 1.45, 1.90

.20 = A(.960^1)

and solve for A

Answer 37

i will explain how i got the values of x

Answer 38

but u can solve for A now and tell me what u get

Answer 39

I thinks I did it right I got right I got .20833

Answer 40

can you plaes make sure i did it right

Answer 41

ok that is the same as i got but i think u have the wrong R

Answer 42

that is the corect R^2 .960

Answer 43

what do u mean by R^2

Answer 44

u can make sure n your calculator

Answer 45

so u mean R^2 = .960

Answer 46

0.96

Answer 47

0k

Answer 48

so that is ur R or R^2 iam confused

Answer 49

R^2

Answer 50

I think you are supposed to do something like this
http://cphs.dadeschools.net/departments/mathematics/ebooks/alg1mcd/Source/LA108GCD.pdf

I don't have a graphing calculator. But hopefully this makes sense to you.

I believe R is a measure of how good the fit is The data is not a perfect exponential, so you have to find the "best fit".

Answer 51

Nila are you still going to help me

Answer 52

ohh u did not get it from phi

Answer 53

btw, it is statistics not statics.

Answer 54

i did but that does not help me in finding the Projected fareway in 2013

Answer 55

will you please help eme furthur

Answer 56

but after u find these things like r and A i can help u further

can u plz do these steps and tell me the r and A and then it is easy to get 2013

Answer 57

in this case they call it a and b so plz just find thoses and tell me

Answer 58

meant those

Answer 59

Did u get the answer?

Answer 60

I got A to be .208333 and R to be .96

Answer 61

I think

Answer 62

ok

y=Ar^x

= .2083333(.96^x)

y=2013 or 11 since the difference between 2013and 2003 plus 1 is 11

= .2083333(.96^11)

= the answer

Answer 63

did u get the answer?

Answer 64

i got 13296

Answer 65

is that right

Answer 66

the numbers are right but it is supposed to be in decimal

0.132966

Answer 67

the projeced subway fare in the year 2013 is how .132966505

Answer 68

so that is it

Answer 69

yeah do u have the answers with u to check

Answer 70

yes I do and how would I round the answer to the nerest cent

Answer 71

so it is right

Answer 72

doesn't the calculator give an A and a B?

so the model would be A*B^t
where t is years since 1959

B should be bigger than 1, because this graph should be growing.
when you raise number less than 1 to a power, it gets smaller.

Answer 73

yeah it does but we used the same equation from another site so it is the same thing but just deffernt letters

we had

A for a and R for b

Answer 74

just round it like this 0.13 or 0.132

Answer 75

@toxicsugar22

Answer 76

Sanity check: do you think the price is going to be 13 cents.

Answer 77

B is going to be about 1.05 or so. and A is about 0.20

Answer 78

well the problem is that i don't have agraphing calculator so i just depend on her answers and i have no other way to check it

Answer 79

and the price in 2013 is going to be about 3.11

Answer 80

well how did U get that?

Answer 81

I used matlab, and did a least squares fit to the log(price)
But toxic has to do it with a calculator.

Answer 82

mine is only ball park.

Answer 83

thanks phi and Nali

Answer 84

I appreciate it

Answer 85

did u get the right answer in the end?

Answer 86

yes thanks

Answer 87

ur welcome u r a very patient learner :)