I have a definition for "functions" in my math book, but I don't understand it. The definition is "a relation in which each first coordinate is paired with exactly one second coordinate" Can someone explain it?

- stapel_eliz
**Posts:**1738**Joined:**Mon Dec 08, 2008 4:22 pm-
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Thank you! Now I understand it!

Now I have another definition "dependent variable" (*regarding functions*) the definition is: "the variable representing the second elements of the ordered pairs in a function; the outputs." Does this basically mean "The y-values in an equation regarding that function"?

- stapel_eliz
**Posts:**1738**Joined:**Mon Dec 08, 2008 4:22 pm-
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stapel_eliz wrote:Yes. The x-value is the "independent" variable: you, independently, choose the value of x. The y-value is the "dependent" variable: it depends on what you picked for x.

Thanks!