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anonymous
 one year ago
please help :)
Function or not a function? one to one or many to one? please explain! Pictures attached.
anonymous
 one year ago
please help :) Function or not a function? one to one or many to one? please explain! Pictures attached.

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Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0A function is a relation in which no two ordered pairs have the same first number.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sorry, i'm having a hard time uploading photos. There are specific ones I don't get

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is the first picture a function? I know the rest but not sure if they're one to one or not

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2the first picture is just a picture of one graph right?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2Anyways have you ever heard of a vertical line test?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah, but i'm still not sure about that one :/

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2the holes you see there means the function isn't actually defined there do you know that?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2for example: dw:1435801685311:dw f(1)=1

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2like f(1) is not assigned to 0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh so does that mean it passes the vertical line test?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohh thanks! how do you tell if it's one to one?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2there is a horizontal line test you can perform

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2if you draw a horizontal line and more than one point lies on it then it is not onetoone

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wait so do i consider the points that aren't defined

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2you only considered things that are defined

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is it one to one then because the other point isn't defined

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2dw:1435801820547:dw back to my picture again this function is not onetoone because you have both f(1/2)=0 and f(0)=0 so for example on the imaginary horizontal line y=0 we see that more than one point lies it dw:1435801903911:dw

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2no just so you know when you see a curve or a line you are actually seeing infinitely many points together

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2dw:1435801941050:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh!! i get it now. thanks! so the second picture, first one is not one to one right? and the circle graph isn't too? but the third (line) is?

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2we could also looked at the other line segment I drew but we only need one example to tell us that the function is not onetoone

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2well the second one is not even a function do you know why?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yep doesn't pass the vertical line test

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2the second picture first graph sorry

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2anyways the first graph is a function because it passes the vertical line test why do you say it is non one to one?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0idk i think it is because there is like a straight line on the x axis in the middle? so it doesn't pass the test or is that wrong

myininaya
 one year ago
Best ResponseYou've already chosen the best response.2ok I thought that graph was basically of f(x)=x^3 which looks like this: dw:1435802164888:dw which is onetoone but I'm having a little trouble reading that graph if that graph is really: dw:1435802205725:dw then yeah it isn't one to one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok thanks! i think i got the hang of it. :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wait I just took a test and it had a problem with the second graph you drew. I put it wasn't one to one and it was incorrect? ://
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