SOLUTION: What is a function? Can I have a example of a function using the variable x explain how you evaluate a function for the given value of x.

Question 436805: What is a function? Can I have a example of a function using the variable x explain how you evaluate a function for the given value of x.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
A function is something that maps a set of x-values (or inputs) to a set of y-values. Each x-value can only map to at most one y-value, if it has two y-values it is not classified a function.

For example, if , we can substitute x with a number or expression:

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