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NationalTutoringObservatory
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MathEd-PII

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volunteer
sure
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volunteer
Lily got you
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[ { "pii_type": "PERSON", "surrogate": "Lily", "start": 0, "end": 4 } ]
student
OK.
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volunteer
So
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volunteer
rational numbers, it's just numbers that can be written as a fraction. I'm just going to rate it for you.
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student
OK
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volunteer
We could do
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volunteer
this
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volunteer
or we could do 7/1.
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volunteer
Rational numbers can also be decimals
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volunteer
and
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volunteer
both
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student
OK. Can they be like any decimals or does it matter?
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volunteer
decimals it matters actually.
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student
OK.
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volunteer
so
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volunteer
for example, irrational numbers. I'm getting into that.
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volunteer
like pie, it's a never ending decimal and it will make you vomit.
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student
Hm
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volunteer
So I just remember it like the.
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volunteer
and the square root of 2, it keeps on going.
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volunteer
You can see the value of um pie and square root of 2.
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volunteer
and you will get me.
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student
OK
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volunteer
The decimals which are terminating.
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volunteer
they are um
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student
OK
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volunteer
rational because they have an end like 0.25 or 0.3 or 0.75 because they can be written as a fraction, 25/100, 3/10, 75/100. And then you can simplify it more.
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student
Oh, OK. So do, um, like
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volunteer
So, would you like to give me some questions which we could go over or you're good, Lily?
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[ { "pii_type": "PERSON", "surrogate": "Lily", "start": 84, "end": 88 } ]
student
Oh yeah, one question, so like square roots like I'm just writing one for example, like, could that, is that or irrational or rational?
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volunteer
OK, you need to figure out the value of it. Put it in your calculator.
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student
OK
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volunteer
and then just write whatever you figure out.
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student
So then it would be a rational because it's like not one that.
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volunteer
Did you round it? Like how many digits were after it.
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student
Oh
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student
it's like
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student
a lot of digits.
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volunteer
OK, just put like I don't know, I'm just gonna put it in my calculator, wait a second.
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volunteer
Hi
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student
Hi!
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volunteer
ok
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volunteer
let's start with statement A.
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volunteer
what do you think?
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student
i want to say its true but it should go to 7
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volunteer
you are right
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volunteer
but the statement is also true because it says between 3 and 6 what happens to the function
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volunteer
as long as this is true, then the statement is true
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student
okay
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volunteer
it doesn't say anything about 7
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student
but doesn't the line reach to 7?, so maybe an error in the writing
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volunteer
no
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volunteer
as long as what it says is true, then it is true
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student
ok
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student
statement B is true
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volunteer
so how about statement C?
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volunteer
good
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student
its true too
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student
because it faces up
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volunteer
yes
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volunteer
again we only care about what happens between 3 and 6
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student
mhm
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volunteer
how about statement D?
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student
thats false because even though it decrease its not facing down.
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volunteer
exactly
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volunteer
it is still concave up
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volunteer
any other question?
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student
yes two more ill post it, but im getting a hang of it
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volunteer
great
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volunteer
let me clear the board.
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volunteer
wow this one is interesting
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student
lol ik
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volunteer
how about statement E?
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student
how do you find p(x)<0?
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volunteer
these two pieces. right?
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volunteer
because they are below the x-axis
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student
rightt
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volunteer
so what do you think?
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student
ummm i think true
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volunteer
you are right!
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student
ok great
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volunteer
let's move on to statement F?
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student
wait it increases
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student
and then decrease
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volunteer
x > 0 means to the right of the y-axis
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student
oh lemme jot that down
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student
gimme a sec
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volunteer
ok
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student
okay so statement G is true bc it is decreasing
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volunteer
yes!
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volunteer
now statement H?
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student
clearly false but lemme develop my reason
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volunteer
ok
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student
so thats false bc its decreasing and concave down?
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volunteer
x<0 is which region?
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student
below the x axis?
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volunteer
that's for p(x)
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volunteer
x<0 is to the left of y-axis
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student
ohh
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