Functions

Which of the following is the correct definition of a function?

• Every x-value must be paired with exactly one y-value.

  "x" cannot repeat!

• Every y-value must be paired with exactly one x-value.

  "y" cannot repeat!

Tags

CCSS.8.F.A.1

Which set of ordered pairs represents a function?

• {(5, 3), (4, 7), (2, 8), (6, 10)}

• {(1, 4), (-9, 5), (-4, 3), (-9, -5)}

• {(0, 4), (0, 3), (0, 2), (0, 7)}

• {(1, 8), (1, 9), (2, 8), (3, 9)}

Which set of ordered pairs does NOT represent a function?

• {(0, 2), (1, 4), (2, 6), (3, 8)}

• {(1, 5), (2, -6), (3, 8), (-4, 10)}

• {(-5, 9), (-2, 8), (-7, 6), (-4, 9)}

• {(1, 3), (1, 5), (2, 7), (3, 9)}

Does the mapping diagram shown above represent a function?

• Yes

• No

Does the mapping diagram shown above represent a function?

• Yes

• No

Tags

CCSS.8.F.A.1

What test is used to determine if a graph of a relation is a function?

• horizontal line test

• diagonal line test

• vertical line test

• circle test

Does the graph shown above represent a function?

• Yes

• No

Does the graph shown above represent a function?

• Yes

• No

Does the graph shown above represent a function?

• Yes

• No

When is the QUIZ for this unit?

• tomorrow

• next Monday

• next Tuesday

• There's a quiz?