Unit 3 Review

Front

What is a function?

Back

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

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

Given the relation {(-2, 5), (a, 4), (6, -3), (7, -8)}, what value of 'a' makes it a function?

Back

a = 5.

Front

Is the relation {(1, 2), (1, 3)} a function? Why?

Back

No, because the x-value 1 has two different y-values (2 and 3).

Front

What does it mean for a relation to not be a function?

Back

A relation is not a function if at least one x-value is paired with more than one y-value.

Front

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

Back

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

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 the range of the graph if all y-values are possible?

Back

The range is all real numbers.