1. Lesson 1.7 An Intro to Functions What is a function?

2. Key Vocabulary Function: a rule that establishes a relationship between two quantities call an input and an output; for each input there is exactly ONE output Domain: the collection of all input values of a function Range: the collection of all output values of a function

3. Making a function table

4. Writing Equations for functions As you dive deeper and deeper into the ocean, the pressure of the water on your body steadily increases. The pressure at the surface of the water is 14.7 pounds per square inch (psi). The pressure increases at a rate of.445 psi for every foot you descend. Represent the pressure P as a function of the depth d for every 20 feet you descend until you reach the depth of 120 feet.

5. Is the table a function?

6. Make an input output table Use 0, 1, 2, 3 as the domain y= 3x + 2 y= 21- 2x

7. Functions You are in charge of advertising for the drama club’s next performance. You can make two signs from a poster board that is 36 inches long and 24 inches wide. Each poster board costs $.75. – Write an equation that shows the relationship between the number of signs and the total cost of the poster board

8. Functions