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Mathematics 13 Online
OpenStudy (anonymous):

Please help me answer this question below...

OpenStudy (anonymous):

OpenStudy (cwrw238):

d

OpenStudy (anonymous):

B

OpenStudy (anonymous):

now im confused...

OpenStudy (cwrw238):

i think i;m correct but i;ll check it out on wolfram

OpenStudy (anonymous):

alright thanks :)

OpenStudy (cwrw238):

yes its d

OpenStudy (cwrw238):

check it out on http://www.wolframalpha.com/input/?i=2+sin+%28x-pi%29

OpenStudy (anonymous):

The top graph looks like B

OpenStudy (anonymous):

thanks alot guys! i'm going for D

OpenStudy (anonymous):

The bottom graph is from -20 to 20.. You want the one from 0 to 2pi

jimthompson5910 (jim_thompson5910):

It's definitely not D for sure, it's either B or C

OpenStudy (anonymous):

I think it does go from 0 to pi, horizontically.

OpenStudy (anonymous):

whoa im so confused now :(

jimthompson5910 (jim_thompson5910):

ok, just checked the graph once more and i'm 100% sure it's B

OpenStudy (anonymous):

how did you come to that conclusion?

jimthompson5910 (jim_thompson5910):

The graph of y = 2*sin(x-pi) is concave down from x = 0 to x = pi, which matches choice B

jimthompson5910 (jim_thompson5910):

also, the graph is decreasing on the interval (-pi/2, pi/2), which also matches choice B

OpenStudy (anonymous):

oh alright. Thank you very much!

OpenStudy (cwrw238):

yes - sorry - i made a mistake - the answer is b

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