Functions Practice

Front

What is a function?

Back

A function is a relation where every input (x-value) has exactly one output (y-value).

Front

Which of the following sets of values is a function? (9,5) (10,5) (9,-5) (10,-5), (3,4) (4,-3) (7,4) (3, 8), (6,-5) (7, -3) (8, -1) (9, 1), (2, -2) (5, 9) (5, -7) (1, 4)

Back

(6,-5) (7, -3) (8, -1) (9, 1) is 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.

Front

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

Back

No, it is not a function because the input 1 has two different outputs (2 and 3).

Front

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

Back

Domain: {0, 1, 2, -4}, Range: {1, -3, -4}.

Front

What are the x-values in a function called?

Back

The x-values are called the domain.

Front

What are the y-values in a function called?

Back

The y-values are called the range.

Front

What is a relation in mathematics?

Back

A relation is a set of ordered pairs, which can include functions.

Front

If a function has an input of 3 and outputs 5, what is the ordered pair?

Back

The ordered pair is (3, 5).