# Identifying Functions | Printable Worksheets

Identifying functions worksheets are up for grabs. Equip high-school students with this printable practice set to assist them in analyzing relations expressed as ordered pairs, mapping diagrams, input-output tables, graphs and equations to figure out which one of these relations are functions based on the pairing of the domain (x) and range (y).

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Identifying Functions | Relation - Ordered Pair

An input value and its corresponding output value make an ordered pair. Analyze each set of ordered pairs and state whether each relation is a function.

Identifying Functions | Relation - Table

Examine the inputs (x-coordinates) and outputs (y-coordinates) keenly. The criterion for a relation to be a function is that each input should have only one output. Also, x-coordinates shouldn't be duplicated.

Identifying Functions | Relation - Mapping

Mapping is a graphical representation of how the elements of the domain and range are paired. One-to-one and many-to-one domain-range relations are functions, while one-to-many are not.

Identifying Functions | Graph

Inspect the graph to see if any vertical line drawn would intersect the curve more than once. If it does, the graph does not represent a function, else it does.

Function or Not? | Equation

When a relation is denoted as an equation, the dependent variable y is expressed in terms of x, the independent variable. For a relation to be a function, there should be one y-value for any x-value inserted.

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