3/4 Quiz: Function Notation Review

How would you write

 $y=2x-3$  in function notation?

•  $y=2x-3$  
  

•  $f=2x-3$  

•  $f\left(x\right)=2x-3$  
  

f(x) is the same thing as ______.

• y
• x
• input
• an equation

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

• Let x = 2

• Let y = 2

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

• Plug a 1 in for all the x's

• Set the function equal to 1

• Only plug a 1 into the left side

• Only plug a 1 into the right side

If f(x) = 2x + 1, find f(1).

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

If f(x) = 6x - 9, find f(4).

• (4, 1)

• (4, 33)

• (4, 15)

• (4, -7)

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

• 6
• 7
• 8
• 9

Given f(x)=5x-2 and g(x)=x², find f(2)+g(7)

• 8

• 57

• 49

• -41

Given f(x)=0.5x²+4x and g(x)=7-2x, find f(4)-g(3).

• 19

• 23

• 7

• 1

Given f(x) = -4x - 10 and f(x) = 10. Find x

• x = -5
• x = 5
• x = -50
• x = 30