What is a function?
Identifying Functions with graphs

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•
Mathematics
•
8th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.
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
Which of the following is a function? {(1,2), (2,3), (3,4), (1,5)}
Back
Not a function, because the input '1' is related to two different outputs (2 and 5).
4.
FLASHCARD QUESTION
Front
Which of the following is a function? {(2,3), (3,4), (4,5), (5,6)}
Back
This is a function, as each input is related to exactly one output.
5.
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 related to more than one output.
6.
FLASHCARD QUESTION
Front
If a graph has a curve that loops back on itself, is it a function?
Back
No, it is not a function, as it fails the vertical line test.
7.
FLASHCARD QUESTION
Front
What is an ordered pair?
Back
An ordered pair is a pair of numbers used to represent a point in a coordinate system, typically written as (x, y).
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