1) A function is often described as a machine as it consists of an input and output.

An example of a function:

f(x)=x^2 (Where y=x^2)

So if x=2,

f(2)=4

So an input of 2, gives an output of 4.

2) y is dependent on x.

3) Yes. There is a relationship between x and y in which if x changes, y changes too.

Done by Wei Qin and Lindsay

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