#1
Ok this is a little embarrasing, i can't seem to find the answer to this simple question... "Functions are said to rules on variables X and Y, are all rules functions? why?"
#5
Quote by saphrax
Cows produce milk, but is all milk produced by cows?


yeah, something like that but honestly i have no idea...
#6
If there is more than one value for x, then it isn't a function. For example, y=x^2 is a function, but x=y^2 isnt. x= | y^2 | would be, though.
#7
Quote by Unforgotten
x = across
y= horizontal


And this is why we don't ask the pit for homework help.

DON'T MAKE ME DESTROY YOU!


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Quote by Scumbag1792
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#8
Quote by -xCaMRocKx-
And this is why we don't ask the pit for homework help.

Lol. I only just read that...
#9
Quote by lp_std
functions cut the x axis more than once. relations do not. so no, all rules are not functions


That makes no sense, your tellin me "y=x+1" isnt a function? Im sorry but i think it is.

Quote by umop-3p!sdn
If there is more than one value for x, then it isn't a function. For example, y=x^2 is a function, but x=y^2 isnt. x= | y^2 | would be, though.


Functions dont have to have an inverse, it just means its not injective.

A function is basically a set of rules that tells you how to get from the set X to the set Y.
But all rules arent function. For example, X>0 is a rule, saying X has to be positive, but it by no means maps the set X to another set, and so isnt a function.
#11
Quote by saphrax
Cows produce milk, but is all milk produced by cows?


*insert joke about your mother producing milk


Quote by Unforgotten
x = across
y= horizontal


I lol'd
O.o

Lets have a sexy partay!


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#13
Quote by soulflyV
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A cat has legs, a table has legs, therefore table = cat.