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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

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  1. anonymous
    • one year ago
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    correct or not? lol im confused on this one

  2. anonymous
    • one year ago
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    you pick A why?

  3. Jack1
    • one year ago
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    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
    • one year ago
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    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
    • one year ago
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    graph attached

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  6. anonymous
    • one year ago
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    so it's b! :D

  7. Jack1
    • one year ago
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    yeps ;)

  8. anonymous
    • one year ago
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    thanks! :D can you help me on one more?

  9. Jack1
    • one year ago
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    all real numbers

  10. Jack1
    • one year ago
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    sure==> shoot

  11. anonymous
    • one year ago
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    I wanna say C

  12. Jack1
    • one year ago
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    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

  13. anonymous
    • one year ago
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    yea that's what got me xD cause I mean there is no stop point on the graph so I was like uuuugh xD

  14. Jack1
    • one year ago
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    given the choices we have though... wouldn't D be a better answer than C tho?

  15. anonymous
    • one year ago
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    yes I get it now lol because y was at 0 too

  16. anonymous
    • one year ago
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    2 more?

  17. Jack1
    • one year ago
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    sure, posts gettin a bit long tho, maybe close an open a new one?

  18. anonymous
    • one year ago
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    ok thanks :)

  19. anonymous
    • one year ago
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    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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