Function or Relation

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What is a relation in mathematics?

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A relation is a set of ordered pairs, where each pair consists of an input (or domain) and an output (or range). It describes a relationship between two sets.

Tags

CCSS.8.F.A.1

Front

What is a function in mathematics?

Back

A function is a specific type of relation where each input is associated with exactly one output. In other words, no two ordered pairs can have the same first element.

Tags

CCSS.8.F.A.1

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How can you determine if a relation is a function?

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You can determine if a relation is a function by using the vertical line test: if a vertical line intersects the graph of the relation at more than one point, it is not a function.

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What is the domain of a function?

Back

The domain of a function is the set of all possible input values (x-values) for which the function is defined.

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What is the range of a function?

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The range of a function is the set of all possible output values (y-values) that the function can produce.

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What is the difference between a function and a relation?

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The main difference is that a function assigns exactly one output for each input, while a relation can assign multiple outputs for a single input.

Tags

CCSS.8.F.A.1

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Can a function be represented as a graph?

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Yes, a function can be represented as a graph on a coordinate plane, where the x-axis represents the input values and the y-axis represents the output values.

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What is a one-to-one function?

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A one-to-one function is a function where each output is associated with exactly one input, meaning no two different inputs produce the same output.

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What is a many-to-one function?

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A many-to-one function is a function where multiple inputs can produce the same output.

Tags

CCSS.8.F.A.1

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What is an example of a relation that is not a function?

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An example of a relation that is not a function is the set of points that form a circle, as a vertical line can intersect the circle at two points.