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Functions

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Functions

Algebra

Definitions

Relation – a set of coordinate points (x, y)

Domain – the x-values, input

Range – the y-values, output

Function – a relation where for every value of the domain the is exactly one value of the range

Domain

(Student’s Name)

Range

( Student’s Grade)

A

B

C

Roscoe

Julia

Dan

Felicity

Lucas

- Graph the “grade” function

Grade

Student’s Name

Domain

(gallons used)

Range

(miles traveled)

2

5

7

10

13

36

90

116

180

234

- Graph the “mileage” function
- Write the equation that represents the data

- What does the graph of a function look like?
- What does it NOT look like?
- Give examples of graphs that are functions.
- Give examples of graphs that are NOT functions.

- Vertical Line Test (VLT)
- What is the definition if the VLT?
- How and why is it used?