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Mathematics 23 Online
OpenStudy (anonymous):

I need help

OpenStudy (anonymous):

OpenStudy (anonymous):

You just have to go through each answser choice and solve it out.

OpenStudy (anonymous):

Would you like me to show you ?

OpenStudy (anonymous):

Yes please :)

OpenStudy (perl):

ok lets see

OpenStudy (anonymous):

Ok give me a second to do the work

OpenStudy (anonymous):

kay

OpenStudy (perl):

if y varies directly as x , then y = k*x. so y/x is a constant k

OpenStudy (anonymous):

okay

OpenStudy (anonymous):

I just wanna say something is 2.) c ?

OpenStudy (perl):

so what happens when you divide y / x

OpenStudy (anonymous):

For the first problem, you have to look at the first anser choice, which is y=2.75x. So you have to multiply 2.75 by each number in the X column to see if it equals what is in the Y column. If it does not equal out, then that is not the correct answer.

OpenStudy (anonymous):

okay

OpenStudy (anonymous):

And you continue to do that with the choices until you find the one that equals to them.

OpenStudy (anonymous):

Do you understand what i mean?

OpenStudy (perl):

I got y = 1.375 x

OpenStudy (perl):

because y / x = 1.375

OpenStudy (anonymous):

okay and yeah I understand and how @perl

OpenStudy (anonymous):

oh wait nevermind hah I had a brain fart lol

OpenStudy (anonymous):

number 2 is d right

OpenStudy (perl):

hi, sorry i was afk

OpenStudy (perl):

do you agree that y = 1.375 x ?

OpenStudy (anonymous):

yeah

OpenStudy (perl):

ok good , lets do the next one

OpenStudy (perl):

remember when y varies directly with x, the graph is a straight line through the origin

OpenStudy (anonymous):

okay

OpenStudy (perl):

|dw:1353020545422:dw|

OpenStudy (perl):

because if you use y = mx + b , the y intercept here is 0 , b = 0

OpenStudy (perl):

and the slope is k

OpenStudy (perl):

now for part b) , we have to make sure that y / x is always constant

OpenStudy (anonymous):

okay

OpenStudy (perl):

is it constant?

OpenStudy (anonymous):

no

OpenStudy (perl):

correct, so y does not vary directly with x

OpenStudy (perl):

because y/x is not constant

OpenStudy (anonymous):

yup :) I have some more questions wanna help

OpenStudy (perl):

ok

OpenStudy (anonymous):

you ready

OpenStudy (perl):

ok

OpenStudy (anonymous):

Describe how the graphs of y = |x| and y = |x + 3| are related. A.) The two graphs are the same. B.) The graphs have the same shape. The y-intercept of y=|x| is 0, and the x-intercept of the second graph is 3. C.) The graphs have the same shape. The y-intercept of y=|x| is 0, and the y-intercept of the second graph is 3. D.) The graphs have the same shape. The y-intercept of |x| is 0, and the x-intercept of the second graph is –3.

OpenStudy (anonymous):

there is more

OpenStudy (perl):

ok

OpenStudy (perl):

we know that f(x+3) moves the graph of f(x) to the left horizontally 3 units. (horizontal shift )

OpenStudy (anonymous):

okay

OpenStudy (perl):

so do you have a graphing calculator

OpenStudy (anonymous):

no :(

OpenStudy (anonymous):

Write an equation in point-slope form for the line through the given point with the given slope. (3, –10); m = –0.83 A. y – 10 = –0.83(x + 3) B. y – 10 = –0.83(x – 3) C. y – 3 = –0.83(x + 10) D. y + 10 = –0.83(x – 3)

OpenStudy (anonymous):

can some one please help

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