## anonymous one year ago What are the domain and range of the function? (E R is the weird E and R sign, I believe it means infinite) y = 2x + 5 Domain X | X E R ; Range y | y >= 0 <---- My answer Domain X | X E R ; Range y | y E R Domain X | X E R ; Range y | y > -2.5 Domain X | X E R ; Range y | y >= -5

1. anonymous

correct or not? lol im confused on this one

2. anonymous

you pick A why?

3. Jack1

just to clarify: symbols are: $e~ is \in$ and R is the capital R which looks like 2 R's drawn over the top of eachother?

4. anonymous

yes and I chose A cause I didn't see anything negative in the equation, I could be very wrong though, I tried drawing it out on a graph but I Just can't see it

5. Jack1

graph attached

6. anonymous

so it's b! :D

7. Jack1

yeps ;)

8. anonymous

thanks! :D can you help me on one more?

9. Jack1

all real numbers

10. Jack1

sure==> shoot

11. anonymous
12. anonymous

I wanna say C

13. Jack1

cool... so domain are all possible inputs (x values) and range is all possible outputs... yeah? just based on where ur graph starts and stops i'd put domain as 0-4 and range as 0 to 2... i don't really see any of the answers as correct as i can't see the equation for the line, so i don't know if it continues on past x=4...? otherwise it looks like it may curve back downwards towards the x axis

14. anonymous

yea that's what got me xD cause I mean there is no stop point on the graph so I was like uuuugh xD

15. Jack1

given the choices we have though... wouldn't D be a better answer than C tho?

16. anonymous

yes I get it now lol because y was at 0 too

17. anonymous

2 more?

18. Jack1

sure, posts gettin a bit long tho, maybe close an open a new one?

19. anonymous

ok thanks :)

20. anonymous

The second statement is the correct :domain X and range Y is all elements E(numbers) of real numbers R for this function exist because the function is a straight line