What is a function in mathematics?
Functions

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Mathematics
•
8th - 9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A function is a relation that assigns exactly one output for each input from a given set.
2.
FLASHCARD QUESTION
Front
How can you determine if a relation is a function?
Back
A relation is a function if no two ordered pairs have the same first element with different second elements.
3.
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 any vertical line intersects the graph at more than one point, it is not a function.
4.
FLASHCARD QUESTION
Front
What does it mean for a function to be linear?
Back
A linear function is a function that graphs to a straight line and can be expressed in the form y = mx + b, where m is the slope and b is the y-intercept.
5.
FLASHCARD QUESTION
Front
What is a nonproportional relationship?
Back
A nonproportional relationship is one where the ratio of the output to the input is not constant.
6.
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 has a unique output.
7.
FLASHCARD QUESTION
Front
What is an example of a relation that is not a function?
Back
An example of a relation that is not a function is {(1, 2), (1, 3)}, where the input 1 has two different outputs.
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