This week in math 10 we learned about the domain and range of a relation. The domain of a relation is all possible values that can be used as the input of the independent variable and the range is all possible values that can be used as the output of the dependent variable.

Also when working with graphs, remember that x-values = input values, therefore x-values = domain, and y-values = output values and y-values = range.

When using brackets there are two different sets with two different meanings:

Closed brackets: Equal to – [ ]

Open brackets: Not equal to – ( )

Example: When working with graphs or ordered pairs, the domain and range can be determined by listing the inputs and outputs.

Ordered pairs:

(1,3), (-2,4), (3,5), (7,8),

D: {1, -2, 3, 7}

R: {3, 4, 5, 8}