Question

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

Answer 1

correct or not? lol im confused on this one

Answer 2

you pick A why?

Answer 3

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?

Answer 4

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

Answer 5

graph attached

Answer 6

so it's b! :D

Answer 7

yeps ;)

Answer 8

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

Answer 9

all real numbers

Answer 10

sure==> shoot

Answer 11

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

Answer 12

I wanna say C

Answer 13

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

Answer 14

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

Answer 15

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

Answer 16

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

Answer 17

2 more?

Answer 18

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

Answer 19

ok thanks :)

Answer 20

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