Identifying Functions

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•
Mathematics
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a function?
Back
A function is a relation that assigns exactly one output for each input.
2.
FLASHCARD QUESTION
Front
How can you tell if a set of ordered pairs represents a function?
Back
A set of ordered pairs represents a function if no two pairs have the same first element with different second elements.
3.
FLASHCARD QUESTION
Front
Does the following set of ordered pairs represent a function: {(1, 2), (1, 3), (2, 4)}?
Back
No, because the first element '1' is paired with two different second elements '2' and '3'.
4.
FLASHCARD QUESTION
Front
Does the following set of ordered pairs represent a function: {(1, 2), (2, 3), (3, 4)}?
Back
Yes, because each first element is paired with exactly one second element.
5.
FLASHCARD QUESTION
Front
What is a mapping diagram?
Back
A mapping diagram visually represents a function by showing how each input is paired with an output.
6.
FLASHCARD QUESTION
Front
Does the following mapping represent a function: {1 -> 2, 1 -> 3, 2 -> 4}?
Back
No, because the input '1' is mapped to two different outputs '2' and '3'.
7.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
The vertical line test is a method to determine if a graph represents a function; if a vertical line intersects the graph at more than one point, it is not a function.
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