Lesson 1.4 ‐ Patterns and Functions
Vocabulary
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A function is a relationship that assigns exactly one output value for each input value.
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A function rule is an equation that describes a functional relationship.
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Ex 1:
Suppose you are buying apples from a vending machine. Use the table to write a function rule.
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Ex 2:
Make a two‐story house by adding one toothpick that goes from side‐to‐side. Use the table to write a function rule.
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An independent quantity is the input
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A dependent quantity is the output
Ex 3:
Suppose you want to find out how much gas a trip will take in a car that uses one gallon of gas to go about 18 miles. What is the independent quantity and dependent quantity for this situation?
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Ex 4:
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The domain is the set of all of the possible values of the input
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The range is the set of all possible values of the output
Ken burns 425 calories per hour when he bikes. He bikes from 3 to 7 hours each weekend. Identify the independent and dependent quantities for this situation and find reasonable domain and range values.
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Homework: Page 29 #1‐15
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