Functions

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•
Mathematics
•
8th - 12th Grade
•
Hard
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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
Is the relation {(1,2), (2,3), (3,4)} a function?
Back
Yes, because each x-value has only one y-value paired with it.
3.
FLASHCARD QUESTION
Front
Is the relation {(1,2), (1,3), (2,4)} a function?
Back
No, because the x-value 1 has two y-values (2 and 3) paired with it.
4.
FLASHCARD QUESTION
Front
What is the domain of the function {(0,1), (1,-3), (2,-4), (-4,1)}?
Back
D: {0, 1, 2, -4}.
5.
FLASHCARD QUESTION
Front
What is the range of the function {(0,1), (1,-3), (2,-4), (-4,1)}?
Back
R: {1, -3, -4}.
6.
FLASHCARD QUESTION
Front
How can you determine if a graph represents a function?
Back
Use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.
7.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
A method to determine if a graph is a function by checking if a vertical line crosses the graph more than once.
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