Function Notation

Function Notation

Objective: Evaluate functions written in function notation.

Function Notation

a specific way to write a relation when it is a function. ​

General Function Notation: f(x)

Said out loud: "f of x"

​

Example:

y = 3x + 2 is a function.

So it can be written as f(x) = 3x + 2

Fill in the Blanks

Given y = 2x + 1, find the value of y when x = 5

EXAMPLE​

​Given f(x) = 4x - 9, find f(2).

Multiple Choice

Find f(10). If f(x)= -4x -10

• x = -5

• x = 40

• x = -40

• x = -50

Multiple Choice

For babysitting, Nicole charges a flat fee of $3, plus $5 per hour. Write an equation in function notation to represent this situation, where the total amount she earns would be represented by m(x).

• $$m\left(x\right)=3x+5$$

• $$m\left(x\right)=5x+3$$

• $$m\left(x\right)=8x$$

• $$m\left(x\right)=5x-3$$

Multiple Choice

Find $$f\left(-3\right)$$

• -2

• 10

• 8

• no solution

Multiple Choice

What is f(8)?

• 8

• 0

• 3

• -2

Multiple Choice

Find f(-1)

• -3

• 15

• 19

• 17

Multiple Choice

If f(x) = 19, Find the value for x.

• 0

• 1

• 2

• 3

Multiple Choice

If f(x) = 3 Find the value of x.

• 2

• 4

• 6

• 0