Intro to Functions first half test

Which set of ordered pairs represents a function?

• {(2, –2), (1, 5), (–2, 2), (1, –3), (8, –1)}

• {(3, –1), (7, 1), (–6, –1), (9, 1), (2, –1)}

• {(6, 8), (5, 2), (–2, –5), (1, –3), (–2, 9)}

• {(–3, 1), (6, 3), (–3, 2), (–3, –3), (1, –1)}

What is the domain of the function shown in the mapping?

• {x | x = –5, –3, 1, 2, 6}

• {y | y = –9, –6, 0, 2, 4}

• {x | x = –9, –6, –5, –3, 0, 1, 2, 4, 6}

• {y | y = –9, –6, –5, –3, 0, 1, 2, 4, 6}

What is the range of the given function?

{(–2, 0), (–4, –3), (2, –9), (0, 5), (–5, 7)}

• {x | x = –5, –4, –2, 0, 2}

• {y | y = –9, –3, 0, 5, 7}

• {x | x = –9, –5, –4, –3, –2, 0, 2, 5, 7}

• {y | y = –9, –5, –4, –3, –2, 0, 2, 5, 7}

Which table represents a function?

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Which explains why the graph is not a function?

• It is not a function because the points are not connected to each other.

• It is not a function because the points are not related by a single equation.

• It is not a function because there are two different x-values for a single y-value.

• It is not a function because there are two different y-values for a single x-value.

The function f(x) is given by the set of ordered pairs.

{(1,0), (–10,2), (0,6), (3,17), (–2,–1)}

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Which is true regarding the graphed function f(x)?

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The ordered pair given in the bottom row can be written using function notation as

• f(9)=5.

• f(5)=9.

• f(5, 9)=14.

• f(9, 5)=14.

The table represents a function.

What is f(-2)?

• -3

• -1

• 1

• 3

Which fraction has a terminating decimal as its decimal expansion?

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