What is a function?
7th Hour: Functions

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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
How can you determine if a relation is a function?
Back
A relation is a function if no x-value is paired with more than one y-value.
3.
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.
4.
FLASHCARD QUESTION
Front
Give an example of a function.
Back
An example of a function is the relation {(1,2), (2,3), (3,4)}.
5.
FLASHCARD QUESTION
Front
What is a non-function?
Back
A non-function is a relation where at least one x-value is paired with multiple y-values.
6.
FLASHCARD QUESTION
Front
Identify if the following is a function: {(1,2), (1,3), (2,4)}
Back
No, because the x-value 1 has two different y-values (2 and 3).
7.
FLASHCARD QUESTION
Front
What does it mean for a function to be one-to-one?
Back
A one-to-one function is a function where each y-value is paired with exactly one x-value.
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