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NationalTutoringObservatory
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MathEd-PII

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8
student
to positive as 0, right?
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volunteer
Uh-huh
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student
And then it comes
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student
here.
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volunteer
and then back to negative, right?
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volunteer
Cause it's positive to negative. Yeah, looks good to me.
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student
Yeah, I don't think I touched it though.
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volunteer
That's up to you to decide. I can't see from here.
16,453
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student
OK.
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student
like this
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student
Oh no.
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volunteer
Yup, that looks good to me. Doesn't look good to you?
16,453
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volunteer
OK.
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student
It was crooked at, it was like straight lineup so.
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volunteer
I don't think it needs to be exact. I just think it um wants to be a bit bumpy.
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student
so.
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student
Mhm
16,453
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student
Oh
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student
Oh my gosh, I hate inequalities.
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volunteer
Let's see. What does it say? 5 X and then 2 minus 8 is less than 0 or equal to.
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student
Yeah
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volunteer
All right, so when would it equal 0?
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volunteer
At what two numbers
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student
Oh
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student
Well, it's
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volunteer
At what
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student
oh, we're trying to find the boots.
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volunteer
Yeah, we're plotting the roots. So what, what two numbers would it equal 0 at?
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student
Uh
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student
05.
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volunteer
Where'd you get -5
16,453
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student
Oh.
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student
0
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volunteer
Yeah, because 5 times what is 0.
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student
0
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volunteer
Yup
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student
And then the second one, would it be 0 or no?
16,453
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student
04,
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student
4.
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volunteer
2 X minus 8. Then with 2, yep.
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student
less than or equal to. That means it's as close.
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volunteer
Well, we are, we're just finding the roots right now.
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student
Oh yeah.
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volunteer
So
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student
Yeah
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student
side choices
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volunteer
So plug in a number less than 0.
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student
negative.
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student
OK, so this is gonna be negative.
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volunteer
Uh
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student
And then this is gonna be
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student
negative
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volunteer
yep
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student
Do we need to do this
16,453
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volunteer
Do we need to do what
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student
No
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student
Does it
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volunteer
No, I wouldn't bother with it yet cause now we're just making a sign chart.
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student
Yeah
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volunteer
Because wherever it's negative, it has to be less than 0, right?
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student
Wait, negative times negative is positive so it used to be positive.
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volunteer
Are we sure on that
16,453
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volunteer
Yup.
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student
Right? Negative times the negative.
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volunteer
I'm just asking if you're sure on that. I know it's, I know you're right.
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student
Oh
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student
OK, 1
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student
positive
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student
and um negative.
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volunteer
Yep
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volunteer
Uh-huh
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student
So negative.
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student
And then this one positive.
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student
and positive
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volunteer
Good.
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student
Oh.
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student
interval notation
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student
How do you write the answer? So let me see example.
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volunteer
Sorry.
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student
like affinity
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student
0. How do I write? You see how they're writing it and like it's about.
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volunteer
Yeah, so let's go look at our normal problem.
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student
I don't know how to write it
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volunteer
All right. So, it can't be, so it's greater than or equal to 0, right?
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student
Mhm. It's less than working.
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volunteer
So do you know how to make it, so you know um how to make inclusive brackets.
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volunteer
So you, you
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student
She what
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volunteer
you know how to use parentheses to exclude things, right?
16,453
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student
Yeah
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volunteer
So brackets would be inclusive. And so when is it um less than or equal to 0.
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student
Mhm
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volunteer
Well, positive can't be less than 0, right?
16,453
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student
Oh yeah, yeah.
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volunteer
And so, when would it be less than or equal to 0 at what numbers?
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student
Wait, what
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volunteer
Well, when does it equal to 0?
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student
Why isn't it this one?
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student
Oh
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student
what
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