8.PFA.2&3 Domain, Range, and Functions

Front

What is the definition of a function?

Back

A function is a relation where each input (domain) has exactly one output (range).

Tags

CCSS.8.F.A.1

Front

What is the domain of a relation?

Back

The domain of a relation is the set of all possible input values (x-coordinates).

Front

What is the range of a relation?

Back

The range of a relation is the set of all possible output values (y-coordinates).

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Front

How do you determine the domain from a set of ordered pairs?

Back

List all the first elements (x-values) from each ordered pair.

Front

How do you determine the range from a set of ordered pairs?

Back

List all the second elements (y-values) from each ordered pair.

Front

What is the vertical line test?

Back

The vertical line test is 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.

Front

What does it mean if a relation is not a function?

Back

It means that at least one input value (x) is associated with more than one output value (y).

Tags

CCSS.8.F.A.1

Front

Given the relation {(1, 2), (2, 3), (3, 4)}, what is the domain?

Back

The domain is {1, 2, 3}.

Front

Given the relation {(1, 2), (2, 3), (3, 4)}, what is the range?

Back

The range is {2, 3, 4}.

Front

What is an example of a function?

Back

An example of a function is f(x) = 2x + 3, where each x value has one corresponding y value.

Tags

CCSS.8.F.A.1