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6.3: Domain & Range

Domain and range describe the values for x and y that are appropriate on a graph.

Domain - Set of all possible values for the independent variable in a relation.

Think: What values can ‘x’ be?

Range - Set of all possible values for the dependent variable in a relation.

Think: What values can ‘y’ be?

Let’s begin with a number line:

[pic] [pic]

Ex. 1: Determine the domain and range from a graph.

|[pic] |Domain |Range |

| |In words: |In words: |

| |The domain is the set of all real numbers between -6 |The range is the set of all real numbers between |

| |and +5. |-8 and +8. |

| |On a number line: |On a number line: |

| | | |

| | | |

| | | |

| |Set notation: |Set notation: |

| | | |

| | | |

| |Interval notation: |Interval notation: |

| | | |

| | | |

Domain Range

List:

Interval notation:

Set notation:

Domain Range

In words:

Interval notation:

Set notation:

Practice questions on Domain and Range:

1) Worksheet: Domain and Range

2) Extra: Page 301 to 304: # 1 to 6, 12

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