Grade 8 Topic V

The set of ordered pairs representing a function is plotted on the graph.

Which set represents the domain of the function?

• {−5, −2, −4, 3}

• {−5, 2, 0, −3}

• {−5, −3, −4, 3}

• {−5, −2, 0, 3}

Select all mapping diagrams that represent a function?

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A function of 𝑥 consisting of four ordered pairs is shown.

Which is the domain of the function?

• {0,3,5,7}

• {0,2,4,6}

• {3,5,7,9}

• {2,3,4,6}

A set of ordered pairs shown represents a function.

{(−2,1), (−4, −2), (4,7), (−6,8), (0,2)}.

What is the domain of the function?

• {-2,1,2,7,8}

• {-9,3}

• {-2,4}

• {-6,-4,-2,0,4}

A set of ordered pairs representing a function is shown.

{(2,0), (4,0), (6,0), (8,0)}

What is the range of the function?

• {0,2,4,6,8}

• {0}

• {4,6,8}

• {2,4,6,8}

Which function is not linear?

• y – 7 = 2(x + 4)

• 5x – 6y = 17

Which of these is a correct statement about the function graphed below?

• Its equation is y = 2x, so it is not a linear function.

• Its equation is y = 2x, so it is a linear function.

• Its equation is y = 2^x, so it is not a linear function.

• Its equation is y = 2^x, so it is a linear function.

Which table could represent a linear function?

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Several input and output values of different functions are shown in the table. Which table represents a linear function?

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A person cycles from their home to a library which is 8 kilometers away. It takes them 20 minutes to reach the library. They stay there for 30 minutes to read, and then walk to their friend's home which is 4 kilometers from the library and reach there in 20 minutes. Which graph best represents this situation?

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