Functions Review

Front

What is a function?

Back

A function is a relation that assigns exactly one output (y-value) for each input (x-value).

Front

Which of the following is not a function? (3,4) (4,-3) (7,4) (3,8)

Back

This set is not a function because the input '3' corresponds to two different outputs: '4' and '8'.

Front

How do you identify a function from a set of ordered pairs?

Back

A set of ordered pairs is a function if no x-value is repeated with different y-values.

Front

What is an ordered pair?

Back

An ordered pair is a pair of numbers (x,y) where 'x' is the input and 'y' is the output.

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 does it mean for a mapping to be a function?

Back

A mapping is a function if each input is associated with exactly one output.

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 the domain of a function?

Back

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

Front

What is the range of a function?

Back

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