Interpreting & Describing Functions

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What is a function?

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.

Tags

CCSS.8.F.A.1

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What does it mean for a function to be increasing?

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A function is increasing if, as the input values increase, the output values also increase.

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What does it mean for a function to be decreasing?

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A function is decreasing if, as the input values increase, the output values decrease.

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What is a linear function?

Back

A linear function is a function that graphs to a straight line and can be expressed in the form f(x) = mx + b, where m is the slope and b is the y-intercept.

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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What is a nonlinear function?

Back

A nonlinear function is a function that does not graph to a straight line and may include curves, parabolas, or other shapes.

Tags

CCSS.8.F.A.3

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How can you determine if a relation is a function using a table?

Back

A relation is a function if each input (x-value) corresponds to exactly one output (y-value). If any input is repeated with different outputs, it is not a function.

Tags

CCSS.8.F.A.1

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What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the change in y divided by the change in x (rise over run).

Tags

CCSS.8.EE.B.5

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What does the y-intercept represent in a function?

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The y-intercept is the point where the graph of the function crosses the y-axis, representing the output value when the input is zero.

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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.