What is a function?
Is it a function?

Flashcard
•
Mathematics
•
9th 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 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 is the horizontal line test?
Back
The horizontal line test determines if a function is one-to-one. If a horizontal line intersects the graph at more than one point, the function is not one-to-one.
4.
FLASHCARD QUESTION
Front
Is the set of values (2,3), (3,4), (2,5) a function?
Back
No, it is not a function because the input '2' has two different outputs (3 and 5).
5.
FLASHCARD QUESTION
Front
Is the set of values (1,2), (2,3), (3,4) a function?
Back
Yes, it is a function because each input has a unique output.
6.
FLASHCARD QUESTION
Front
What does it mean for a relation to be not a function?
Back
A relation is not a function if at least one input is associated with more than one output.
7.
FLASHCARD QUESTION
Front
Which graph passes the vertical line test?
Back
A graph that does not have any vertical line intersecting it at more than one point.
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