What is a function? And what are some examples?

Question

amistre64 · Answer

a function is a special type of relation that can be used to make predictions

amistre64 · Answer

as a result; you do one thing, and can expect only one thing as a result

amistre64 · Answer

a function from say:  M to N  maps all of the elements of M onto a unique element in N

amistre64 · Answer

such that:

x in M = f(x) in N

amistre64 · Answer

|dw:1328663275052:dw|opps, not a function lol

amistre64 · Answer

2 is not mapped

and if we pick 1, do we get a single outcome?  or do w ehave to choose?

mertsj · Answer

A function is a set of ordered pairs in which no two ordered pairs have the same first number.

amistre64 · Answer

they can have the same first number as long as they have the same second number; but sets tend to be properly written such that you discard duplicates

anonymous · Answer

thanks

mertsj · Answer

yw

anonymous · Answer

http://www.mathsisfun.com/sets/function.html