Mathematics
OpenStudy (anonymous):

Which graph represents the function y = –2x² – 5? https://www.connexus.com/content/chrome/online/default.aspx?idSection=164909&idLesson=138060&idWebuser=532739

OpenStudy (ash2326):

@sydneyy your question requires login. Will you please post a snapshot of the graphs?

OpenStudy (anonymous):

i can try..

OpenStudy (ash2326):

ok:)

OpenStudy (anonymous):

graph a

OpenStudy (ash2326):

post all:)

OpenStudy (anonymous):

graph b

OpenStudy (anonymous):

graph C

OpenStudy (anonymous):

graph D

OpenStudy (ash2326):

Ok \[y=-2x^2-5\] let's write this as \[y+5=-2x^2\] As there is - with x^2 so the graph will open down so either its b or d

OpenStudy (ash2326):

Now if it were just \(y=-2x^2\) the graph's vertex would be at zero but here we have \[y+5=-2x^2\] when x=0 y=-5 so here the vertex is at (0,-5) so it's d

OpenStudy (anonymous):

thanks alot:)

OpenStudy (ash2326):

Welcome:D

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