anonymous
  • anonymous
Does the data in the table represent a direct variation or an inverse variation? Write an equation to model the data in the table. x 2 4 8 12 y 4 2 mc019-1.jpg 2/3 direct variation; y = 8/x direct variation; y = 8x inverse variation; xy = 8 inverse variation; y/x = 8
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous

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LynFran
  • LynFran
whats mc019.jpg
anonymous
  • anonymous
2/3
anonymous
  • anonymous
I'm stumped on this also
LynFran
  • LynFran
y=kx is direct variation y=k/x is an inverse variation
LynFran
  • LynFran
so lets see
LynFran
  • LynFran
when x=2 y=4 when x=4 y=2 when x=8 y=?? when x=12 y=2/3
LynFran
  • LynFran
whats y when x=8
LynFran
  • LynFran
im not seeing the value
LynFran
  • LynFran
this is what im seeing y 4 2 mc019-1.jpg =====whats this value??? 2/3
anonymous
  • anonymous
it is 1
LynFran
  • LynFran
ok
LynFran
  • LynFran
y=kx if its direct variation we will use when x=2 y=4 so 4=k2 4/2=k 2=k we will use when x=4 y=2 so 2=k4 2/4=k 1/2=k when x=8 y=1 1=k8 1/8=k as we see k is constantly changing so...this is not direct variation
anonymous
  • anonymous
so what is it?
LynFran
  • LynFran
y=k/x inverse variation when x=2 y=4 4=k/2 4*2=k 8=k when x=4 y=2 2=k/4 2*4=k 8=k when x=8 y=1 1=k/8 1*8=k 8=k so yes its inverse variation k=8
LynFran
  • LynFran
|dw:1442973105994:dw|
anonymous
  • anonymous
k=8?
LynFran
  • LynFran
sub the value of k in to get answer
LynFran
  • LynFran
yes 8
anonymous
  • anonymous
xy=8
LynFran
  • LynFran
correct

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