Datasets:
NationalTutoringObservatory
/
MathEd-PII

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volunteer
Yes all possible x values
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volunteer
so what go you think the domain is for this function?
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volunteer
do*
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student
-4 to 4
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volunteer
Yes very good
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volunteer
Now, in ur course, to u use interval notation?
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volunteer
do*
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student
ok
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volunteer
Can u write the domain in interval notation?
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volunteer
OK I see
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volunteer
I was looking at my keybd
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volunteer
That is fine
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volunteer
Now how about the range?
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student
-4 to infinity
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volunteer
I disagree
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student
oh
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volunteer
what is the defintion of range?
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student
y vaules
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volunteer
Yes
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volunteer
now what the the allowed vlaues on this grpah (f0r y)?
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student
idk
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volunteer
OK well what is the smallest y value that is on the red curve?
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student
-4?
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student
4
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volunteer
I disagee
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volunteer
I think 4 is the *largest y vlaue
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volunteer
now what is the smallest
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student
- infinity
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volunteer
Remember y is the *vertical* axis
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student
0
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volunteer
Yes 0 is the snmallest
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volunteer
and 4 is the l;rgest So can u write the rnage in interval notation?
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volunteer
good !!!
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student
:)
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student
what Abt the f(0)
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volunteer
OK
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volunteer
I forgot that ! LOL
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volunteer
what vlaue of x do we sue to get f(x))?
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student
lollll
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volunteer
use*
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student
4
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volunteer
I disagree
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volunteer
we have f(x) as a function
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volunteer
so for f(0)) what is x?
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student
idk
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volunteer
OK well y = f(x) and for f(0)) we replace x with 0
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student
so 0
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volunteer
yes so x = 0
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volunteer
and now what is the y vlaue (from the grpah) when x = 0?
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student
0
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volunteer
I disagree
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volunteer
pls look carefully at the grpah
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student
idk sorry
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volunteer
OK well start at x - 0 (at the origina) at then move *up* unitl you hit the red graph I mean straight up along the y-axis
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volunteer
y-axis
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student
I hit 4
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volunteer
Yes good! so f(0)) = 4
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student
ok next one
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student
thank you !
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volunteer
OK]
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volunteer
I will copy to 2nd screen Pls wait
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student
ok
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volunteer
OK what do you think about this one?
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student
I don't even know
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volunteer
OK First I have a comment
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volunteer
I think we need to assume that the blut one continues up the right forever OK?
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volunteer
blue*
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student
yea
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volunteer
and the red one up to the lleft forever OK?
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student
ok
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volunteer
OK So what does that tell us about the possible values of x?
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student
infinity
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volunteer
ok
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volunteer
how about some signs ( - and + )
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volunteer
If x strtas all the way at the left what will be the sing there?
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student
positive
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volunteer
I think left is negative
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student
oh sorry no
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student
yea
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volunteer
so -inf on the left
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volunteer
how about on the right?
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student
positive is on the right
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volunteer
Good
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volunteer
Now can u write the domain in interval notation?
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volunteer
excellent
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volunteer
how about the range?
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student
4 to infinity
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volunteer
my eyes are bad but I htink -3
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volunteer
pls look again
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student
oh ok sorry Abt that
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volunteer
No problem
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volunteer
pls use interval notation now
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volunteer
excellent
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volunteer
BTW are u using a stylus to write on the board?
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student
yes
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volunteer
yes it looks quite nice is it an Apple Pencil?
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student
no its with a Chromebook that the school provided
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volunteer
Oh OK
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volunteer
it works nicely
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volunteer
Now this time I will not forget f(0)
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