What Is A Function?

1. What is a function?
A function is somewhat like a machine. It associates each input and gives out one output.
Here's an example with f(x) = x²:
(x) is the input. We can take 3 as the input, for example.
This will give us an output of 9, gotten from 3^2.

2. What is the relationship between x and y?
x is the input and y is the output.
Therefore, y is reliant on x.

3. Is function a relation?
Yes, it is a relation, between x and y. As mentioned in the previous question, y is reliant on x.
 So if x changes, y will also change accordingly.

Done by Dylan and Edwin.