Terminology (Junior Cert Mathematics): Quizzes

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Terminology
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What is a function in algebra?

A rule changing input to output

What does a function machine do?

Takes a number, changes it, gives output

Why is the order of steps important in a function machine?

Must follow steps in right order

In function notation f(x)=5x+3f(x) = 5x + 3, what does f(x)f(x) represent?

The name of the function

In function notation f(x)=5x+3f(x) = 5x + 3, what does xx represent?

The input

Using f(x)=5x+3f(x) = 5x + 3, what is f(2)f(2)?

1313

What is the domain of a function?

All possible input values

For f(x)=2x+3f(x) = 2x + 3, what is the domain?

All real numbers

What is the codomain of a function?

All possible values that could come out

What is the range of a function?

The actual outputs from the function

How does the range relate to the codomain?

Range is a subset of codomain

For f(x)=x2f(x) = x^2, what is the range?

Non-negative numbers (00 or greater)

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