Datasets:
NationalTutoringObservatory
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MathEd-PII

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volunteer
Sorry, no
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student
whattt
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student
wait im loooking on the wromg paper
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student
its B
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volunteer
#4 is not B either
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student
ohhh
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student
Alex
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[ { "pii_type": "PERSON", "surrogate": "Alex", "start": 0, "end": 4 } ]
volunteer
For one thing, at what value of x does the graph change for #4?
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student
3x-2
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student
and x+2
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volunteer
I am asking at what value of x the function goes from using 3x-2 to using x +2 ?
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student
ohhh 1
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volunteer
Right, but in C, the graph shifts at x =-1, right?
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student
yes
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volunteer
and and B the graph shifts at x =0
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student
yes
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volunteer
so B and C cannot be rigth for #4
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student
so it would only lwave us with E
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student
leave
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volunteer
E is not the only possibility
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student
d too
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volunteer
What would be the y intercetp for #4?
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student
2
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volunteer
No. the y intercept occurs when x =0
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student
ohh
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student
so we get A
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volunteer
in #4, when x=0.which equation should you use the top or the bottom?
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student
bc of the y intercept
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student
too
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student
top
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volunteer
right, and what is the y intercept for 3x-2?
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student
-2
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volunteer
Right, so we already narrowed it down to D and E
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volunteer
which one has a y intercept of -2?
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student
1
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student
i nean
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student
A
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student
noo
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student
E
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volunteer
what is the y intercept on graph E?
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student
nvm its d bc of -2
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student
y intercept
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volunteer
Yes, it's D
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student
Jamie i have to erase the back of this rq
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[ { "pii_type": "PERSON", "surrogate": "Jamie", "start": 0, "end": 5 } ]
volunteer
what do you need for this?
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student
all of it for 9 and 10
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volunteer
You should figure out some points for x <0, 0<x<2, and x >2
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volunteer
do you know what I mean?
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student
-1, 1,0?
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volunteer
Let's firs find f(x) at the two breakpoints.
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student
wdym
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volunteer
the graphs change at x =0 and x =2
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student
wait can u write it on the board
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volunteer
what is f(-1)?
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student
x+1
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volunteer
yes, you use x+1 for x =-1, so what is f(-1)?
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student
-1+1
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volunteer
And what does that equal?
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student
-1,0
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volunteer
OK, plot that point
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student
what
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student
wait so will it he closed
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student
?
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student
be
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student
the point will it be opened or closed
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volunteer
it's just a point, it's not a point where the graph dhanges
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student
oh ok so closed
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volunteer
yes
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volunteer
go ahead and graph it.
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volunteer
I will upload a better graph.
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student
Chris u
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[ { "pii_type": "PERSON", "surrogate": "Chris", "start": 0, "end": 5 } ]
volunteer
for x =0, because it is a point where it shifts we can use both the top and and middle equations. One will be an open point and one a closed point.
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volunteer
if x =0, what does that equal using the top equation?
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student
it would be -x+1
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student
being 0,1
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volunteer
Using x + 1 that would be (0,1)
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student
ohh
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student
so this one will be opened?
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volunteer
using -x+1, that would also be 1
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volunteer
so we can use a closed circle
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student
oh okau so 0 we use x+1?
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volunteer
You need to use both, so that you can see how far the top equation goes.
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volunteer
Now find f(1)), because 1 is between 0 and 2
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volunteer
hello?
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student
-x+1
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student
-1+1
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student
1,0
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student
closed
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volunteer
ok, plot that point
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volunteer
OK, now f(2))
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student
f(2))
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volunteer
Do you know what I mean when I write f(2)?
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student
im confused
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student
so are we on the same orobkem
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volunteer
#9
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volunteer
Do you know what I mean when I write f(2)?
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student
uhh no
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volunteer
OK, you need to know what that notation means.
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volunteer
f(2)) is asking "what is the value of the function when you plug in 2 for x"
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student
ohhh
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