Function Notation

How would you write y = 2x - 3 in function notation?

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

Tags

CCSS.HSF.IF.A.2

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

• Let x = 2

• Let y = 2

Tags

CCSS.HSF.IF.A.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

Tags

CCSS.HSF.IF.A.2

If f(x) = 2x+1, what would the function look like once you substitute in a 1 to find f(1)?

• f(x) = 21+1

• f(1) = 2 (1) + 1

• f(1) = 2x (1) + 1

Tags

CCSS.HSF.IF.A.2

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

• f(1) = 1

• f(1) = 4

• f(1) = 0

• f(1) = 3

Tags

CCSS.HSF.IF.A.2

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

• 2,4

• (2, 4)

• That is the only way to write it.

Tags

CCSS.HSF.IF.A.2

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

• -1
• 1
• 5
• -5

Tags

CCSS.HSF.IF.A.2

g(x) = 3x + 1
g(10) = ______

• 14
• 31
• 15
• -31

Tags

CCSS.HSF.IF.A.2

Let

 $h\left(x\right)=13-5x$  
What is  $h\left(5\right)=$  ?

•  $h\left(5\right)=12$  

•  $h\left(5\right)=3$  

•  $h\left(5\right)=-2$  

•  $h\left(5\right)=-12$  

Tags

CCSS.HSF.IF.A.2

If $f\left(x\right)=1.2-3.4x$  what is the value of  $f\left(5.1\right)$  

•  $f\left(5.1\right)=-7.3$  

•  $f\left(5.1\right)=-16.14$  

•  $f\left(5.1\right)=18.54$  

•  $f\left(5.1\right)=-2.2$  

Tags

CCSS.HSF.IF.A.2