Could anyone explain functions to me?

Question

anonymous · Answer

http://en.wikipedia.org/wiki/Function_%28mathematics%29

anonymous · Answer

-.-

anonymous · Answer

:p

anonymous · Answer

That didn't help whatsoever..

alfie · Answer

You have the cartesians axis, right? Each time you get an X, you get a Y. So given two fields, a function is a law, which given a X finds a Y on the other field.

anonymous · Answer

I just don't know how to graph them. They gave me this weird function i'm post it hold on.

anonymous · Answer

http://assets.openstudy.com/updates/attachments/4e9879d60b8bedaecf4e5509-pssssst-1318615627115-100_0962.jpg

alfie · Answer

You recall the equation of a line, right? 
y=mx+q

this is a function, given X you can find y (m and q are static numbers)
So for example
y= 2x+3
Each time you plug a number into the X you get a value of Y, you connect the dots, and there you go, you have your graph :)

anonymous · Answer

Sorry my handwriting sucks lmaoo

anonymous · Answer

OHHH I get it. Thank you, sweetheart (:

ybarrap · Answer

Basically, a function is a map or rule that maps an element of a set to a single element of another, that's it.