Question

Interval Notation???
I will post the question below.

Answer 1

I have to express the domain and range. Do I just choose random points within the circle?

Answer 2

Do I choose the points that touch each axis?

Answer 3

and how do I specifically write this out for the purpose of answering the question. Curly brackets?

Answer 4

The domain is the set of allowed inputs.

In this case, 's' is the input (it's acting like x)

They give you the restriction for 's' in the problem at the top of the page.

Answer 5

If you want this in interval notation, you use either parenthesis or square brackets for the domain. You'll only use curly brackets for set notation.

Answer 6

I attached the wrong picture.

Answer 7

I apologize!

Answer 8

that's ok

Answer 9

how far to the left does this graph go? what's the smallest x coordinate possible?

Answer 10

-5

Answer 11

yes

Answer 12

how far to the right can you go?

Answer 13

5

Answer 14

so that means \(\Large -5 \le x \le 5\)

Answer 15

how do you write \(\Large -5 \le x \le 5\) in interval notation?

Answer 16

I really don't know. We kind of rushed through it at the end of the last class. Could you teach me how?

Answer 17

Interval notation is basically a way of saying where the interval starts and ends

the left number is the starting point
the right number is the ending point

we use square brackets to include the endpoint
we use round parenthesis to exclude the endpoint

Answer 18

Which means that \(\Large -5 \le x \le 5\) would turn into \(\Large [-5,5]\) when we write it in interval notation

Answer 19

[(-5, 0), (5,0)]?

Answer 20

Opps!

Answer 21

no, we're only focused on the x values

Answer 22

Okay.

Answer 23

think of it like a number line

Answer 24

So the y values would be written like [5, -5] or are they just ignored for the purpose of interval notation?