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doamin is the x in a graph, while the range would be the y

What would it be in the following attached docs?

|dw:1347377860332:dw|

use that. you have to answer the equations first.

This is what the problems looked like. And the ones I attached earlier are the answers.

the first numbers are x and the y are the last numbers

So what would it be?

I have graphed it and everything.

so you good?

No

u need domain and range of
P(s)=69.70s-1077
right?

Yes

what values can s take ? any ?

What do you mean?

is there any restriction on value of s ?

First I found P(0) which equals (0, -1077). Then I found P(s) which equals (15.45, 0)

Those are the two points. Now I have to graph it and then find the domain and range.

Wouldn't the domain be [0,-1077]?

Is it clear?

I don't get it.

:(

So would range be [0, 15.45]?

lets solve together. you start I'll correct you

I have already solved it earlier. [0, -1077] and [15.45, 0]

Now the directions say to graph these points and then determine the domain and range.

in that answer is correct your domain is (0 infinity) [all possibilities included]

So what's the range?

[-1077 infinity)

Okay so Domain is [0, infinity) and Range is [-1077, infinity). Correct?

yes

Why wouldn't the domain be [0, 15.45]?

first of all no. of radio cannot be 15.45

Nevermind, I got it. Can you help me with one more problem?

Yea sure please ask. If I'll be able to help I'll surely do.

all parts?

Yes

a)
(8, 45.7), (11, 48.1)

Okay

Is (b) y = .8x+39.3 ?

*known

m = 48.1-45.7/11-8 = -2.4/3 = .8
y-y1=m(x-x1)
y-45.7 = .8(x-8)
y-45.7 = .8x-6.4
y = .8x+39.3

yes. you got it.

put x=15 and obtain output

I got I = 51.3

so can you interpret the results?

"In 2015, PA's per capita income was $51.3 thousand." ??

will be

Okay

what about the trend?

I have no clue.

I hope you got it?

Yes, I got it.

:)

I need help with a few more whenever you're free.

ok no problem.

which part?

hey u thr? Is (a) solved.

No. Neither of them are solved. I don't understand any of the parts.

use this to solve (a) http://en.wikipedia.org/wiki/Simple_linear_regression

you need to fit the data given to a equation.

Okay

the line will be y=mx+c form.

find m first using the equations on web page(beta)
then find c( alpha on web page)

let me know when you got something.

Honestly, I have no idea how to do this.

giv me 5 min

now find the average of x and y separately.

got upto this?

How would I find the average of x and y?

sum all numbers of x and divide by total number of values of x, similarly for y

use this it will help http://www2.isye.gatech.edu/~sman/courses/6739/SimpleLinearRegression.pdf

on page 9 formula are written use them.