What is a function?
Functions, Domain & Range

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•
Mathematics
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation where each input (x-value) has exactly one output (y-value).
2.
FLASHCARD QUESTION
Front
What is the domain of a function?
Back
The domain is the set of all possible input values (x-values) for a function.
3.
FLASHCARD QUESTION
Front
What is the range of a function?
Back
The range is the set of all possible output values (y-values) for a function.
4.
FLASHCARD QUESTION
Front
What does the vertical line test determine?
Back
The vertical line test determines if a graph represents a function. If a vertical line intersects the graph at more than one point, it is not a function.
5.
FLASHCARD QUESTION
Front
Which of the following is NOT a function: {(1,-5), (3,1), (-5,4), (4,-2)} or {(1,-5), (-1,6), (1,5), (6,-3)}?
Back
{(1,-5), (-1,6), (1,5), (6,-3)} is NOT a function because the input '1' has two different outputs.
6.
FLASHCARD QUESTION
Front
What is a relation in mathematics?
Back
A relation is a set of ordered pairs, which can include functions but is not limited to them.
7.
FLASHCARD QUESTION
Front
What is an example of a function?
Back
An example of a function is {(1,2), (2,3), (3,4)} where each input has a unique output.
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