## kandsbbf 2 years ago Find the domain and range of the relation and determine whether it is a function. Domain: positive integers; range: positive integers; no, it is not a function. Domain: x > 3; range: y > 0; yes, it is a function. Domain: all real numbers; range: all real numbers; yes, it is a function. Domain: x ³ 0; range: y > 3; no, it is not a function.

1. kandsbbf

2. kandsbbf

@MaeganR

3. MaeganR

Yes?

4. MaeganR

Im not quite sure what you commented me for..?..

5. kandsbbf

could u help me with this please?

6. MaeganR

What is the question? And Im not quite sure.. Im just now actually understanding the slope stuff. Ill try though. Actually @Butterfly16 and @zaynahf might know this. They've been helping me out a LOT lately and I'm sure they could try to help you also. Ill look at it and try to see if I can do it, but I don't really think I can. |:

7. MaeganR

Are you trying to see if its a function?

8. kandsbbf

the question is at the very top and the graph of the question is the first comment... yes

9. Butterfly16

Do you have the equation of the function?

10. MaeganR

I would say its not a function from what I know, but you may want to get extra help from @Butterfly16 on this subject.

11. kandsbbf

no alls their is is a graph and a -3 under the graph

12. Butterfly16

Well, we know that a function is when there are no x values that are the same. You can use the vertical line test to see if its a function. Hold your finger or a pencil up to the graph holding in vertical. and go left to right. if it touches in more than one spot than it isnt a function. Can you figure out if its a function or not?

13. kandsbbf

so it is a function because it touches all diff spots @Butterfly16

14. Butterfly16

Excellent! :o) So, that can eliminate 2 of our answers.

15. MaeganR

Lol. See, Im not much help. Sorry. ),:

16. kandsbbf

so how do i figure out domain and range?

17. Butterfly16

Well, you see that dotted line? It's telling you that the graph doesn't go past that point. So, you can assume that the x value never goes below what number?

18. kandsbbf

yes i can

19. kandsbbf

so its b because c says all real numbers?

20. Butterfly16

I'd think it's b as well. If you look, the x value never goes below 3. Which means x is never going to be 2, 1, 0, -1, -2, etc. And y is never going to be 0 or below, which is how the graph is staying in the all positive quadrant. Does that make sense? :o)

21. kandsbbf

yess (: when i put anotheer one on here can i tag you?

22. Butterfly16

Of course! :o)