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

How do you read f(x)?

• f x

• f of x

• f parenthesis x

• f with an x inside parenthesis

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

If  $f\left(x\right)=x^2+3$ , what is the correct way to find f(x-1)

•  $f\left(x\right)=x-1^2+3$  

•  $f\left(x\right)=\left(x-1\right)^2+3$  

•  $f\left(x-1\right)=x-1+3$  

•  $f\left(x-1\right)=\left(x-1\right)^2+3$  

Tags

CCSS.HSF.IF.A.2

Now that we know  $f\left(x-1\right)=\left(x-1\right)^2+3$ , what is the next step to simplify

•  $f\left(x-1\right)=x^2-1^2+3$  

•  $f\left(x-1\right)=\left(x-1\right)\left(x-1\right)+3$  

•  $f\left(x-1\right)=x_{ }^2+1^2+3$  

•  $f\left(x-1\right)=\left(0\right)^2+3$  

Tags

CCSS.HSF.BF.B.3