Week 1 + Week 2 Chapter 4 Functions Review

Week 1 + Week 2 Chapter 4 Functions Review

Mr. G misses you! PLEASE do your best :)

Review Topics for Quizizz

• ​Identifying a Function

• ​ Domain and Range

• ​ Function Values and Function Tables

Identifying a Function

All functions allow for each INPUT TO ONLY HAVE ONE OUTPUT.​

• When it comes to TABLES, POINTS, MAPPING DIAGRAMS: As long as the x-value does NOT REPEAT, we tend to have a function.

• ​When it comes to GRAPHS, the graphs HAVE TO PASS THE VERTICAL LINE TEST. Our vertical line can only touch the graph ONCE for the graph to be a function.

FUNCTION. NOT FUNCTION FUNCTION NOT FUNCTION

​

Multiple Choice

Is this a function?

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

• Yes

• No

Multiple Choice

Is this a function?

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

• Yes

• No

Multiple Select

Which graphs are function?

Domain & Range

Functions have INPUTS and OUTPUTS.

• We can call INPUTS, x-values, and INDEPENDENT VARIABLES.​

• We can call OUTPUTS, y -values, and DEPENDENT VARIABLES.

• DOMAIN: Has ALL the INPUTS of a function.

• RANGE: Has ALL the OUTPUTS of a function.​

EXAMPLE:

Domain: { 1,2,3,4 }

Range: {2,4,6,8}​

​Sneak peak of this week:

Domain: All numbers from 0 to 4.

Range: All numbers from 0 ​to 4.

Multiple Select

What numbers are in the DOMAIN of this function?

• 6

• 3

• 2

• 9

Multiple Select

What numbers are NOT in the RANGE of this function?

• 6

• 3

• 2

• 9

Multiple Choice

SNEAK PEAK

What is the DOMAIN of this graph?

• All numbers from 0 to 4

• All numbers from 1 to 2

• All numbers from 0 to 2

• All numbers from 1 to 4

Function Values/Tables

​We can represent functions with equations.

EXAMPLE: f(x) = x + 2 is a function that adds 2 to every input. If we need to find f(1), then f(1) = 1 + 2 = 3

​

EXAMPLE: f(x) = 3x -2 is a function that multiplies 3 to every input then subtracts by 2.

If ​we need to f(2) then, f(2) = 3(2) - 2 = 6 - 2 = 4.

​

We can organize function values with function tables!​

Multiple Choice

Find f(2) if f(x) = x + 2

• 2

• 3

• 4

• 6

Multiple Choice

Find f(1) if f(x) = 6 - x

• 2

• 3

• 4

• 5

Multiple Choice

Find f(4) if f(x) = 2x - 1

• 7

• 8

• 4

• 1

Multiple Choice

Find f(-1) if f(x) = 10 + 2x

• 7

• 8

• 4

• 1

Multiple Choice

Find f(-2) if f(x) = 10 - 2x

• 2

• 10

• 14

• 1

The End :)

I miss you guys! Please be on your best behavior!

​

Do make up work or makeup quiz.​