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Question

http://prntscr.com/8xd5z4
answers: http://prntscr.com/8xd63y http://prntscr.com/8xd66y http://prntscr.com/8xd6aj http://prntscr.com/8xd6d7

anonymous · Answer

anonymous · Answer

the one with the question is an answer too

gabebae · Answer

Is there another graph?

anonymous · Answer

yes ill put it in a second cause it wont show

directrix · Answer

Hint: If a is negative, the graph will open downward.

gabebae · Answer

Openstudy is too slow for me right now 
I might not be able to help

anonymous · Answer

so its between a and b @Directrix

anonymous · Answer

and its fine @GabeBae

directrix · Answer

No.  They open upward if I'm looking at the right ones.

Opening downward is something like this:

|dw:1446282687781:dw|