What is a function?
Functions and Notation

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•
Mathematics
•
8th - 9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation where every input (x-value) has exactly one output (y-value).
2.
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.
3.
FLASHCARD QUESTION
Front
Back
4.
FLASHCARD QUESTION
Front
Back
5.
FLASHCARD QUESTION
Front
What is the definition of a relation?
Back
A relation is a set of ordered pairs, where each pair consists of an input and an output.
6.
FLASHCARD QUESTION
Front
Can a function have multiple outputs for a single input?
Back
No, a function cannot have multiple outputs for a single input; each input must correspond to exactly one output.
7.
FLASHCARD QUESTION
Front
What is an example of a non-function?
Back
A relation where an input has two or more outputs, such as the pairs {(1, 2), (1, 3)}.
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