anonymous
  • anonymous
how do you find the interval notation from the domain and range?
Mathematics
  • Stacey Warren - Expert brainly.com
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chestercat
  • chestercat
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anonymous
  • anonymous
interval notation is just a way of writing all the possible values of x and y, so if you know exactly what each are then you can write the notation.
anonymous
  • anonymous
do you just pick out a random number from your outputs?!
anonymous
  • anonymous
no... for example... the graph of y=x^2.... the interval notation for the domain = All reals range = y>=0

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anonymous
  • anonymous
if you had a specific function I could give you what the interval notation is.
anonymous
  • anonymous
|dw:1378787198262:dw|
anonymous
  • anonymous
[0,infinity)
anonymous
  • anonymous
and that is what the interval notation looks like for that... for your problem ....you have to think what the possible x values and y values are.
anonymous
  • anonymous
for the domain it would be (infinity, infinity)
anonymous
  • anonymous
for the y (range) it would be [-infinity, 3]
anonymous
  • anonymous
sorry the domain is supposed to be (-infinity, infinity)
anonymous
  • anonymous
do you understand how i get this?
anonymous
  • anonymous
Okay well for the question I have to find the domain and range? and you know how you make that chart thingie and you plug random numbers for x? am i allowed to plus in 0 or any negatives? I'm sort of confused because i know we're not allowed to have a 0 or a negative for the denominator but its not a fraction? I'm sorry if I'm confusing? I'm just really lost
anonymous
  • anonymous
|dw:1378787560275:dw|
anonymous
  • anonymous
That is what the graph looks like with your function... you will notice that the possible y values of this graph starts at 3 and goes does all the way to neg. infinity... thus the range is (-infinity,3).... then you notice that the domain (all the x's) can go from -infinity all the way to positive infinity... thus the domain is (-infiinity,infinity)
anonymous
  • anonymous
you could make a chart and plug in random numbers for x and get numbers back for y, but finding the domain and range you dont need to do that in this case.
anonymous
  • anonymous
ohh okay!! Thanks so much dude!
anonymous
  • anonymous
Hi|dw:1378788146973:dw|
anonymous
  • anonymous
yw
anonymous
  • anonymous
HI! sorry to bother you again but I just plugged in these coordinates and i got a negative?! is the negative okay?|dw:1378788479509:dw|

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