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.

Question

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.

anonymous · Answer

attachment

anonymous · Answer

@MaeganR

maeganr · Answer

Yes?

maeganr · Answer

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

anonymous · Answer

could u help me with this please?

maeganr · Answer

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. |:

maeganr · Answer

Are you trying to see if its a function?

anonymous · Answer

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

anonymous · Answer

Do you have the equation of the function?

maeganr · Answer

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

anonymous · Answer

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

anonymous · Answer

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?

anonymous · Answer

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

anonymous · Answer

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

maeganr · Answer

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

anonymous · Answer

so how do i figure out domain and range?

anonymous · Answer

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?

anonymous · Answer

yes i can

anonymous · Answer

so its b because c says all real numbers?

anonymous · Answer

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)

anonymous · Answer

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

anonymous · Answer

Of course! :o)