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Which of these two relations are functions?

AdamTaurus  May 17, 2017
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 #1
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(I),(II) But im not sure what are you asking for im sorry but only (I),(II) can be Equations

Whitespy001  May 17, 2017
edited by Whitespy001  May 17, 2017
 #2
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Remember that a function has to pass the vertical line test......that is,  if we draw any vertical line on a graph, it can only cut that graph at no more than one point

 

So

 

I and II  are functions ....any vertical line will  cut both graphs at only one point

 

II  and IV  are not ......a vertical line will cut both at two points

 

 

cool cool cool

CPhill  May 17, 2017
edited by CPhill  May 17, 2017
 #3
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Thanks! That was a super helpful explanation and will come in handy on my Algebra II final next week.

AdamTaurus  May 17, 2017
 #4
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So i was right ty CPhill because english is not my language and i don't understand if this is the question! Thank you! 

Whitespy001  May 17, 2017
 #5
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Adam remember F(x)=y,x1,2,3...=y1 but can't different y be = with the same x this CPhill means'' if we draw any vertical line on a graph, it can only cut that graph at no more than one point'' 

 

I hope you pass your exams! 

Whitespy001  May 18, 2017

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