Question

Plz explain? State the DOMAIN of each of the following relations.


I'm brushing up on pre calc and algebra before college but this stumps me and the book doesn't explain anything...

{(x,y): x = sqrt of y}

Answer 1

We can do a quick review of DOMAIN, co-domain, and range if you want.

Answer 2

Ok

Answer 3

Write a simple linear equation in a function notation.

Answer 4

?

Answer 5

okay so this tells me that you don't know what is a function either

Answer 6

hmm how about write a linear equation in slope-intercept form

Answer 7

I do I just don't understand what you said. Algebra is a language I don't speak well...

Slope intercept is y=mx+b right?

Answer 8

correct

Answer 9

Do not worry. The reason I am asking is because I am trying to figure out what I need to include in the vocabulary and what I need to emphasize as we go along.

Answer 10

ok

Answer 11

so go ahead, give me a linear equation in a slope-intercept form

Answer 12

y=3x+2

Answer 13

great!
So a linear equation in slope-intercept form \(y = 3x +2 \) can be written in a function format by changing the y into f(x). It could be also g(x), V(x) or any variable and then followed by (x). The reason we are using (x) is because our equation on the right hand side used x, that needed to be evaluated.

So it can be written in function notation as:
\(f(x) = 3x +2 \)

Answer 14

I hope we get this part clear.

Answer 15

Yes I get it. Change y to "variable"(x) for function format.