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

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- anonymous

correct or not? lol im confused on this one

- anonymous

you pick A why?

- 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?

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## More answers

- 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

- Jack1

graph attached

##### 1 Attachment

- anonymous

so it's b! :D

- Jack1

yeps ;)

- anonymous

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

- Jack1

all real numbers

- Jack1

sure==> shoot

- anonymous

ok so almost the same thing, https://k12va.aplusanywhere.com/R85Content/media/pictures/algebra1a/4-2-2-14.gif?ts=1433574583941
I know this is an easy one but I want to be certain I get it right lol
A: https://k12va.aplusanywhere.com/R85Statics/media/pictures/algebra%20ia/4.2.2/test/14/1419027972933/1366x768/1419027972933.png
B:
https://k12va.aplusanywhere.com/R85Statics/media/pictures/algebra%20ia/4.2.2/test/14/1419027972929/1366x768/1419027972929.png
C:
https://k12va.aplusanywhere.com/R85Statics/media/pictures/algebra%20ia/4.2.2/test/14/1419027972931/1366x768/1419027972931.png
D:
https://k12va.aplusanywhere.com/R85Statics/media/pictures/algebra%20ia/4.2.2/test/14/1419027972927/1366x768/1419027972927.png

- anonymous

I wanna say C

- 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

- 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

- Jack1

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

- anonymous

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

- anonymous

2 more?

- Jack1

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

- anonymous

ok thanks :)

- 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

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