Function or Not a Function

Flashcard
•
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 where each input (x-value) has exactly one output (y-value).
2.
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.
3.
FLASHCARD QUESTION
Front
What does it mean if a relation is not a function?
Back
If a relation is not a function, it means that at least one input (x-value) is associated with more than one output (y-value).
4.
FLASHCARD QUESTION
Front
Which of the following is a function? (3,4) (4,-3) (7,4) (3, 8) or (2, -2) (5, 9) (5, -7) (1, 4)?
Back
(3,4) (4,-3) (7,4) (3, 8) is a function because all x-values are unique.
5.
FLASHCARD QUESTION
Front
What is an example of a relation that is not a function?
Back
An example is the relation {(1,2), (1,3), (2,4)} because the input '1' has two different outputs.
6.
FLASHCARD QUESTION
Front
What is the definition of a relation in mathematics?
Back
A relation is a set of ordered pairs, where each pair consists of an input and an output.
7.
FLASHCARD QUESTION
Front
How can you tell if a graph is a function by looking at its graph?
Back
You can tell if a graph is a function by using the vertical line test.
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