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OKAY LET US TRY

IF YOU WANT TO BUY THIS BOOK, HOW MUCH WOULD YOU PAY?

@hwyl i wouldn't even buy it, i don't like math lol

THIS IS JUST A HYPOTHETICAL QUESTION

IF YOU WERE TO BUY A $60.00 BOOK, HOW MUCH WOULD YOU EXPECT TO PAY?

$60.00

GOOD SO LET US CREATE A TABLE

|dw:1442095256587:dw|

let us say you and your friend wanted to buy the book, how much you two pay?

buy the book for each of you to own

make sense

let us update our table

$120.00

|dw:1442095394341:dw|

let us say that 20 students needed to buy the book, how much would it sum to?

$1,200

cool!
so how about you update our table

what do i plug in for the x-values?

|dw:1442095582413:dw|

DO YOU NOW FIGURE OUT HOW TO CREATE FUNCTIONS?

|dw:1442095906271:dw|

What do you mean by " do i now know how to create functions?"

And can you please stop typing in all capital letters?

i like CAPS

Oh okay then no i don't know how to write an equation in function notation for part a)

I put it in box lol

But how do I create an EQUATION ?

Okay, so you were on the right track

Do you understand why that is the equation?

yes because 60 is the cost for the textbook

So you've already done part A.
f(x) = 60x

Do you know what kind of graph this would be? Linear vs quadratic?

linear because it has a degree of 1?

Very good, very good. You just did part b :) So it would be a straight line

So if you wanted to see how much it would cost to buy 30 books, do you know what you would do?

f(30)=60(30) = $1,800

You even have proper notation, nice. See, you're doing just fine :)

Now, what do you know about domain and range

Domain is {XER} and range is {YER}

I don't really understand how to set them up when i have a bunch of numbers.

I know that i'll need greater and less than signs but idk where to place them

nooo don't say that lol i'm terrible at math.
that's why im here asking a billion questions

So that means there will be an "-or equal to" in there

I'm one of them haha and what you said is true. I do need extra help.

|dw:1442098912668:dw|

I'm not sure

You know what I mean?

so all i'm changing is the greater than signs to less thans ?

So the notation that's generally used for that is

\[x \le 30\]

That says that x is less than or equal to 30

ah okay so..|dw:1442099289067:dw|

what does it mean when you have two numbers inside of the brackets like i did before?

Can you show me an example?

i think im getting the differences mixed up

Oh, I see, okay. So when you have like,
0

So for the purposes of this example, yeah, add that in

|dw:1442099479057:dw|

Glad you pointed that out :)

|dw:1442099423813:dw|

Like that or something ^

yes

So you understand what that means now yeah? And why it should be included?

like the way domains are set up?

Yeah, that

And why you should do 0

Because you haven't bought the textbook yet so you start with 0? I don't know

ahh okay i see. does the same thing go for the range?

{YER|0

Kind of. You have the right idea

So in the range's case, it's all the y-values. So the y-values is the amount paid for textbooks

So what's the lowest value you can pay for a textbook?

(Not a trick question)

Yes, good

So, what is the highest amount you will pay if you have a maximum of 30 students?

30

$1,800

Yup! So what's the range going to be?

{YER| 30>y>1800}

Close

30 has exclusively to do with x, so it's not going to be in there. Let me show you

okay

So lemme fix it ;-;

|dw:1442100303626:dw|

I was thinking about it like apples. Lol. You can have 0 apples, but not a negative apple. Anyways

If you have one student, the maximum you'd pay is $60 for one textbook right?

yes that's true
so is it correct even if i write down 0?

|dw:1442100443760:dw|

or

|dw:1442100503454:dw|

Does that make sense?

Yes, I get it now.
Thank you so much!

You're welcome :) I hope I helped. Sorry for the mixup v,v

That's totally fine. As long as your explanations make sense! (which they did)

thanks again