Topic 3 Review Day 1

Topic 3 Review Day 1

3-1 Relations and Functions

3-2 Linear Functions

3-1 Relations and Functions

• What is a relationship

• What is a function

• What is the domain

• What is the range

Quick Review

A function is a relationship in which every input, or element of the domain, is associated with exactly one output, or element of the range.

Multiple Choice

What is the domain and range of the relationship?

{(4,1),(2,3),(0,4),(5,3)}

• Domain: {4,2,0,5}

  Range: {1,3,4}

• Domain: {1,3,4}

  Range: {4,2,0,5}

Multiple Choice

Is this relationship a function? If so, is it one-to-one or many-to-one?

{(4,1),(2,3),(0,4),(5,3)}

• No, the y value repeates

• Yes, it is many-to-one

• Yes, it is one-to-one

3-2 Linear Functions

• Writing linear functions

• Function notation

• Evaluating Functions

Quick Review

A linear function is a function whose graph is a straight line. IT represents a linear relationship between two variables. A linear function written in function notation is f(x)=mx+b and f(x) is read "f of x"

Multiple Choice

Mo runs a graphic design business. She charges $0.16 per page and has a setup fee of $5.25. What linear function can be used to determine the cost of a project with x pages? How much would it cost for a project with 200 pages?

• f(x) = 5.25x + 0.16 ; $1,050.16

• f(x) = 0.16x + 5.25 ; $37.25

• f(x) = 5.25x + 0.16 ; $52.66

• f(x) = 0.16x + 5.25 ; $32

Poll

How are you feeling about linear functions and relationships?

• I'm a pro for sho!

• I'm starting to get it :)

• Definitely need some more practice.

• HELP!!!