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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.
do you just pick out a random number from your outputs?!
no... for example... the graph of y=x^2.... the interval notation for the domain = All reals range = y>=0
if you had a specific function I could give you what the interval notation is.
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.
for the domain it would be (infinity, infinity)
for the y (range) it would be [-infinity, 3]
sorry the domain is supposed to be (-infinity, infinity)
do you understand how i get this?
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
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)
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.
ohh okay!! Thanks so much dude!
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|