anonymous
  • anonymous
What are the domain and range of the function? y = 3x^2 A: https://k12va.aplusanywhere.com/R85Content/media/pictures/algebra1a/4-2-2-16a.gif?ts=1433575356267 B: https://k12va.aplusanywhere.com/R85Content/media/pictures/algebra1a/4-2-2-16b.gif?ts=1433575356267 C: https://k12va.aplusanywhere.com/R85Content/media/pictures/algebra1a/4-2-2-16c.gif? ts=1433575356267 D: https://k12va.aplusanywhere.com/R85Content/media/pictures/algebra1a/4-2-2-16d.gif?ts=1433575356267
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
I want to say C, I could be very wrong though, (these are not my strong points at all lol )
Jack1
  • Jack1
graph attached for reference if it helps?
1 Attachment
anonymous
  • anonymous
domain:X|XER and range: [2,infinite)

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Jack1
  • Jack1
...?
anonymous
  • anonymous
ok the graph, X has to be equal to or over 0 correct?
Jack1
  • Jack1
no, x can be all +ve or negative numbers
Jack1
  • Jack1
y values (output / range) is stuck in the +ve range tho...
zepdrix
  • zepdrix
|dw:1433586811172:dw|Yah, our x is going all the way right and left. It's going up much faster than it's moving right or left, that might make it a lil confusing. But we WILL cover all the x's.
anonymous
  • anonymous
oh wait no >.< I messed up sorry I get x and y mixed up, so y has to be equal or over 0? so A ?
zepdrix
  • zepdrix
yay good job \c:/
anonymous
  • anonymous
sorry I said x first XD I always get confused on those but yea I understand how the x (domain) is going out infinite so it had to be the y that is equal to or greater than 0, thank you! One more cool? :D
Jack1
  • Jack1
yeps, A ;) all good hey, shoot
anonymous
  • anonymous
A train travels at a steady rate of 80 mph. If the train travels for one-half hour nonstop, what are the domain and range of the distance function during the trip? A: Domain: t = 0.5 ; Range: d(t) = 40 B: Domain: 0 =< t =< 0.5 ; Range: 0 =< d(t) =< 40 C: Domain: t = 0.5 ; Range: d(t) = 80 D: Domain: 0 =< t =< 0.5 ; Range: 0 =< d(t) =< 80
anonymous
  • anonymous
I wanna say C
Jack1
  • Jack1
hmm... k so distance over the time of the trip is between 0 and 40 miles..., so I'd lock in range as between 0 and 40 (depending on time) yeah?
Jack1
  • Jack1
ummm... and domain... in this case relates to time (t) so your domain is between 0 and a 1/2 hour... so domain = 0 to 0.5
anonymous
  • anonymous
If we're gonna lock in 0 to 40 our only choice would be B, so B right? lol
Jack1
  • Jack1
i think i'd go B in this case
Jack1
  • Jack1
yeps, B ;)
anonymous
  • anonymous
awesome! let's see :D
anonymous
  • anonymous
Yes you got it right! 80% thank you soo much :) and than you for teaching me these new things! :DDDD
anonymous
  • anonymous
thank*
Jack1
  • Jack1
np, u did the work hey ;) and props on ur score!
anonymous
  • anonymous
thanks :)
anonymous
  • anonymous
Have a great night, morning or afternoon! :)
Jack1
  • Jack1
night, and totes ;) u 2

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