What is a function?
Functions

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•
Mathematics
•
7th - 9th 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
What is the notation for a function?
Back
Functions are typically denoted by letters such as f, g, or h, followed by parentheses containing the input variable, e.g., f(x).
3.
FLASHCARD QUESTION
Front
What does f(x) = 2x + 1 represent?
Back
This is a linear function where the output is determined by multiplying the input x by 2 and then adding 1.
4.
FLASHCARD QUESTION
Front
If f(x) = 4, what is the value of x in f(x) = 2x + 1?
Back
x = 3/2.
5.
FLASHCARD QUESTION
Front
What is the vertical line test?
Back
A method to determine if a graph represents a function; if a vertical line intersects the graph at more than one point, it is not a function.
6.
FLASHCARD QUESTION
Front
What is a mapping in the context of functions?
Back
A mapping shows how each element of a set (domain) is paired with an element of another set (range).
7.
FLASHCARD QUESTION
Front
What does it mean if a table is not a function?
Back
If any input (x-value) in the table corresponds to more than one output (y-value), it is not a function.
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