Function Notation

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

• y = 2x-3

• f = 2x - 3

• f(x) = 2x-3

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CCSS.HSF.IF.A.2

f(x) is the same thing as ______.

• y
• x
• input
• Fred X

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CCSS.HSF.IF.A.1

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CCSS.HSF.IF.A.2

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

• Let x = 2

• Let y = 2

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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.

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CCSS.HSF.IF.A.2

Given f(x) =
2x² + 5x - 17, find f(-1). 

• f(-1) = -20
• f(-1) = -24

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CCSS.HSF.IF.A.2

What is f(1)?

• 1
• 5
• 0
• 4

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CCSS.HSF.IF.A.2

What is x if
f(x) = -2?

• 4
• 0
• 3
• 8

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CCSS.HSF.IF.A.2

• Not possible

• 5

• 3

• 8

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CCSS.HSF.IF.A.2

• x=2

• x=6

• x=3

• Not possible

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CCSS.HSF.IF.A.2