Writing Functions

What 3 things do you need to write a function?

• 2 Variables

• 1 Variable

• Initial Value

• Rate of change

• Last value

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Jon charges $20 dollars an hour to build a fence. What is the independent variable.

• total charge

• hours

• fence posts

Tags

CCSS.6.EE.C.9

Jon charges $20 dollars an hour to build a fence. What is the dependent variable.

• total charge

• hours

• fence posts

1. For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. What is the initial value?

• $3

• $5

• $8

1. For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. What is the rate of change?

• $3

• $5

• $8

Write the following in function notation.

Attorney A charges a fixed fee on $250 for an initial meeting and $150 per hour for all hours worked after that.

• y=250x + 150

• y = 150x + 250

• y = 150x - 250

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Write in function notation.

Plan B: costs $25 monthly one time membership fee and $15 per visit

• y=25x + 15

• y = 15x + 25

• y = 40x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Write the following in function notation.

A Pizza restaurant offers the following deal $8.99 for on large pizza and $5 for each additional large pizza on the same order

• f(x) = 8.99x + 5

• f(x) = 5x + 8.99

• f(x) = 5x - 8.99