8.F.1-Function or Not a Function

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Mathematics
•
8th - 9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is a function?
Back
A function is a relation where each input (x-value) has exactly one output (y-value).
2.
FLASHCARD QUESTION
Front
What is the definition of 'not a function'?
Back
A relation is not a function if at least one input (x-value) has more than one output (y-value).
3.
FLASHCARD QUESTION
Front
Example of a function: y = 2x + 3. Is this a function?
Back
Yes, this is a function because for every x-value, there is exactly one y-value.
4.
FLASHCARD QUESTION
Front
Example of a relation that is not a function: {(1, 2), (1, 3)}. Is this a function?
Back
No, this is not a function because the input 1 has two different outputs (2 and 3).
5.
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.
6.
FLASHCARD QUESTION
Front
If a relation has the pairs (2, 4), (3, 5), (2, 6), is it a function?
Back
No, it is not a function because the input 2 has two outputs (4 and 6).
7.
FLASHCARD QUESTION
Front
What does the term 'domain' refer to in functions?
Back
The domain is the set of all possible input values (x-values) for a function.
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