What is a function?
Identifying Functions

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•
Mathematics
•
6th - 8th 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
How can you identify a function from a set of ordered pairs?
Back
A set of ordered pairs is a function if no x-value is repeated with different y-values.
3.
FLASHCARD QUESTION
Front
What does it mean if a relation is not a function?
Back
A relation is not a function if at least one x-value is paired with more than one y-value.
4.
FLASHCARD QUESTION
Front
Which of the following is a function? {(2,3), (3,4), (2,5)}
Back
Not a function, because the x-value 2 has two different y-values (3 and 5).
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
Can a function have the same y-value for different x-values?
Back
Yes, a function can have the same y-value for different x-values, as long as each x-value has only one y-value.
7.
FLASHCARD QUESTION
Front
What is an example of a function?
Back
An example of a function is f(x) = 2x + 3, where each input x gives a unique output.
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