SOLUTION: How are these two questions done? Graphs are here: https://answers.yahoo.com/question/index?qid=20140422211758AAiQMa4 Thanks!!

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Question 866870: How are these two questions done?
Graphs are here: https://answers.yahoo.com/question/index?qid=20140422211758AAiQMa4
Thanks!!

Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
19.


20.


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