FUNCTIONS
Flashcard
•
Mathematics
•
7th Grade
•
Practice Problem
•
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 of the following is a function? (3,4) (4,-3) (7,4) (3,8)
Back
Not a function, because the input 3 has two different outputs (4 and 8).
3.
FLASHCARD QUESTION
Front
Identify the function: (6,-5) (7,-3) (8,-1) (9,1)
Back
This is a function because each input has a unique output.
4.
FLASHCARD QUESTION
Front
What does it mean for a set of ordered pairs to be a function?
Back
It means that no two ordered pairs have the same first element (x-value) with different second elements (y-values).
5.
FLASHCARD QUESTION
Front
Is the following set a function? (1,2) (1,3) (2,4) (3,5)
Back
Not a function, because the input 1 has two different outputs (2 and 3).
6.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
A method to determine if a graph represents a function; if a vertical line crosses the graph more than once, it is not a function.
7.
FLASHCARD QUESTION
Front
If f(x) = 2x + 3, what is f(2)?
Back
f(2) = 2(2) + 3 = 7.
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