2.02 (Function Notation)

2.02 (Function Notation)

I can evaluate functions using Function Notation.

Multiple Choice

Do Now: Which of the following definitions describe a Function?

• Each input have ONLY ONE output.

• Each Input has ONE or MORE outputs.

Function Notation

• Function notation is the way a function is written. It is meant to be a precise way of giving information about the function without a rather lengthy written explanation.

• Aka it is giving the function a Name

• Just like variables any letter can be used.

Example

• What is the name of this function?

• What is the function?

• What is the input?

• What is the output?

Multiple Choice

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

• Let x = 2

• Let y = 2

Multiple Choice

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

Multiple Choice

f(x) is the same thing as ______.

• y
• x
• input
• an equation

Multiple Choice

For the function f(x) = -3(x-1) find f(0).

• 0
• -3
• 3
• -1

Multiple Choice

What does f(-4) equal?
f(-4) = -2x - 8

• 8
• -4
• -16
• 0

Multiple Choice

Solve for f(10):
f(10) = -x - 5

• 15
• -5
• -15
• 50