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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
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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 ?
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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?
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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
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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
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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
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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
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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.
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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
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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)