hiralpatel121
What is the domain and range in interval notation of problem #2 in the attached document?
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hiralpatel121
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ghazi
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\[(-\infty,\infty) \]
hiralpatel121
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Why?
ghazi
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because your function is y=3x+7 and this is defined for whole real numbers
ghazi
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@hiralpatel121 clear??
hiralpatel121
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Okay. So the the answer is the same for both the domain and the range?
hartnn
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domain means all the values that t can take so that the function does not become complex,or become undefined
if we observe in V(t) = -203t+9655
for any value of t ,V(t) will be defined.
so domain=(-infinity,infinity)
ghazi
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yes
hartnn
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range mean all the values V(t) can take
as its a linear function,it can take infinite values depending on infinite values of t
hence range is same.
hartnn
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still doubts regarding this?
hiralpatel121
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No, I've got it. I need help with doing parts of number 1 though. I tried to do it but then I got confused.
hartnn
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find all x where f(x)=304
this??
ghazi
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3x+7=304
3x=304-7
3x=297
x=99
hiralpatel121
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That would be the answer for where f(x)=304?
ghazi
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yes
hiralpatel121
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What about parts (d) and (e) for number 1? How would I do those?
hartnn
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for part e, same logic as #2
same domain,range.
ghazi
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you have set of points like let's say two variables are x and y now you have (-6,-11) , (-2,1) and (0,7) plot this on graph paper
ghazi
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your graph will tell you the domain and range
hiralpatel121
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Okay, thank you.
ghazi
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:) YW