Function Notation

Multiple Choice

If a question asks you to find f(2), what does that mean?

• Let x = 2

• Let y = 2

Multiple Choice

If I know that f(2) = 4, what is another way I can write my answer?

• 2,4

• (2, 4)

• 4,2

• (4,2)

Multiple Choice

Evaluate f(-2) if f(x) = x + 3

• -1
• 1
• 5
• -5

Multiple Choice

f(x) is the same thing as ______.

• y
• x
• input
• an equation

Multiple Choice

If f(x) = 2x + 1, what would be your first step to find f(4)?

• Plug in 4 for all the x's

• Set the function equal to 4

• Only plug a 4 into the left side

• Only plug a 4 into the right side

Multiple Choice

f(x) = 2x + 1,

f(1)=2(1)+1=....

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

Multiple Choice

g(x) = 3x + 1
g(2) = _______

• 6

• 7

• 8

• 9

Multiple Choice

Complete the function notation below
f(____) = 214

• 1990

• 1991

• 1989

• 1994

Multiple Choice

f(8) = 12
Convert to coordinate point.

• (8, 12)

• (12, 8)

Multiple Choice

g(-1) = 15
Convert to a coordinate point.

• (15, -1)

• (-1, 15)

Multiple Choice

How would you write

$$y=2x-3$$  in Function Notation?

• $$y=2x-3$$  
  

• $$f=2x-3$$  

• $$f\left(x\right)=2x-3$$  
  

Multiple Choice

Translate the function notation into a coordinate point.

$$f\left(-1\right)=5$$  

• $$\left(-1,5\right)$$  

• $$\left(1,5\right)$$  

• $$\left(5,1\right)$$  

• $$\left(5,-1\right)$$  

Multiple Choice

Translate the coordinate pair into function notation.

$$\left(0,8\right)$$  

• $$f\left(0\right)=8$$  

• $$f\left(0\right)=-8$$  

• $$f\left(8\right)=0$$  

• $$f\left(-8\right)=0$$  

Multiple Choice

Given the function
$$f\left(x\right)=x+3$$  
Evaluate:
$$f\left(-2\right)=..............$$  

• $$f\left(-2\right)=-1$$  

• $$f\left(-2\right)=1$$  

• $$f\left(-2\right)=5$$  
  

• $$f\left(-2\right)=-5$$  
  

Multiple Choice

Use the graph to evaluate $$f\left(2\right)=$$  

• 2

• 5

• 4

• 8

Multiple Choice

Use the graph to evaluate $$f\left(3\right)=$$  

• 1.5

• 5

• 3

• 8

Multiple Choice

Given the graph, 

find the value of x when  $$f\left(x\right)=5$$  

• $$f\left(5\right)=3$$  

• $$x=5$$  

• $$x=3$$  

• $$f\left(5\right)=7$$