Identifying Functions

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•
Mathematics
•
7th - 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 every input (x-value) has exactly one output (y-value).
2.
FLASHCARD QUESTION
Front
Which graph represents a function?
Back
A graph that passes the vertical line test, meaning no vertical line intersects the graph at more than one point.
3.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
A method to determine if a graph is a function; if a vertical line crosses the graph more than once, it is not a function.
4.
FLASHCARD QUESTION
Front
Identify the function from the following set of ordered pairs: {(1,2), (2,3), (1,4), (3,5)}
Back
The function is {(1,2), (2,3), (3,5)} because each input has only one output.
5.
FLASHCARD QUESTION
Front
What is an example of a non-function?
Back
A relation like {(1,2), (1,3), (2,4)} is not a function because the input '1' has two different outputs.
6.
FLASHCARD QUESTION
Front
If f(x) = 2x + 3, what is f(2)?
Back
f(2) = 2(2) + 3 = 7.
7.
FLASHCARD QUESTION
Front
What does it mean for a function to be one-to-one?
Back
A one-to-one function means that each output is paired with exactly one input, so no two different inputs produce the same output.
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