What is a function in mathematics?
TEKS 8.5G

Flashcard
•
Mathematics
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation between a set of inputs and a set of possible outputs where each input is related to exactly one output.
2.
FLASHCARD QUESTION
Front
How can you determine if a set of ordered pairs represents y as a function of x?
Back
A set of ordered pairs represents y as a function of x if no two pairs have the same x-value with different y-values.
3.
FLASHCARD QUESTION
Front
What does it mean for y to be a function of x?
Back
It means that for every value of x, there is exactly one corresponding value of y.
4.
FLASHCARD QUESTION
Front
Identify the ordered pair that does not represent y as a function of x: {(2, 5), (3, 1), (2, 1), (4, 7)}
Back
The pair (2, 1) does not represent y as a function of x because the x-value 2 is associated with two different y-values (5 and 1).
5.
FLASHCARD QUESTION
Front
Which of the following sets represents y as a function of x: {(0, 0), (-1, 2), (-1, -2), (-2, 4)}?
Back
No, it does not represent y as a function of x because the x-value -1 is associated with two different y-values (2 and -2).
6.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
The vertical line test is a method to determine if a curve is a graph of a function. If a vertical line intersects the graph at more than one point, then it is not a function.
7.
FLASHCARD QUESTION
Front
Given the set of ordered pairs {(3, 2), (4, 3), (5, 2), (2, 6)}, does y represent a function of x?
Back
Yes, this set represents y as a function of x because each x-value is unique.
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