Functions Review

Front

What is an ordered pair?

Back

An ordered pair is a pair of numbers used to represent a point in a coordinate system, written in the form (X,Y).

Front

Which of the following is an example of a function? (9,5) (10,5) (4,-5) (8,-5) or (3,4) (4,-3) (7,4) (3,8)?

Back

(9,5) (10,5) (4,-5) (8,-5) is a function because each input (first number) is unique.

Front

What does it mean for a set of values to be a function?

Back

A set of values is a function if each input (X-value) corresponds to exactly one output (Y-value).

Front

In the ordered pair (4,9), what is the x-coordinate?

Back

The x-coordinate is 4.

Front

In the ordered pair (4,9), what is the y-coordinate?

Back

The y-coordinate is 9.

Front

What is the definition of a function?

Back

A function is a relation that assigns exactly one output for each input.

Front

Is the mapping (1,2), (2,3), (3,4), (1,5) a function?

Back

No, it is not a function because the input 1 corresponds to two different outputs (2 and 5).

Front

What is the vertical line test?

Back

The vertical line test is a method to determine if a curve is a function; if a vertical line intersects the curve at more than one point, it is not a function.

Front

What is a domain in a function?

Back

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

Front

What is a range in a function?

Back

The range is the set of all possible output values (Y-values) for a function.