5.1 Identifying Functions
Flashcard
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Mathematics
•
8th Grade
•
Practice Problem
•
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
Which set of ordered pairs is a function? {(9,5), (10,5), (9,-5), (10,-5)} or {(6,-5), (7,-3), (8,-1), (9,1)}?
Back
{(6,-5), (7,-3), (8,-1), (9,1)} is a function because each x-value is unique.
3.
FLASHCARD QUESTION
Front
What are the inputs in a function?
Back
Inputs are the x-values in a function.
4.
FLASHCARD QUESTION
Front
What is the range of a function?
Back
The range is the set of all output (y-values) of a function.
5.
FLASHCARD QUESTION
Front
What does it mean for a function to be one-to-one?
Back
A one-to-one function means that each input has a unique output, and no two inputs share the same output.
6.
FLASHCARD QUESTION
Front
Identify the function: A: {(1,2), (2,3), (3,4)}, B: {(1,2), (1,3), (3,4)}, C: {(2,2), (2,3), (3,3)}, D: {(4,5), (5,6), (6,7)}
Back
A and D are functions because each x-value is unique.
7.
FLASHCARD QUESTION
Front
What is the domain of a function?
Back
The domain is the set of all possible input (x-values) for a function.
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