# F number relationship

. If it crosses more than once it is still a valid curve, but is not a function. is when the function shows us how to go directly from x to y, such as: When we know x, we can find y That is the classic style that we often work with. In other words it is not a function because it is not single valued A Benefit of Ordered Pairs We can graph them. But a function doesn't really have belts or cogs or any moving parts - and it doesn't actually destroy what we put into it! A function an input to an output. Explicit vs Implicit One last topic: the terms "explicit" and "implicit".

The "x" is Just a Place-Holder! Don't get too concerned about "x", it is just there to show us where the input goes and what happens to it. F number relationship. So Many Names! Functions have been used in mathematics for a very long time, and lots of different names and ways of writing functions have come about. F number relationship. L relationship status.

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. So we need something more powerful, and that is where sets come in: A set is a collection of things.

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. " is the classic way of writing a function.