Function Notation

Function Notation

Functions

• each input has one output

• in other words, each x has one y

Multiple Choice

For the following function, what is the input?

f(x) = x + 3

• f

• x

Multiple Choice

For the following function, what is its name?

f(x) = x + 3

• f

• x

To evaluate a function written in function notation, we replace the input with the given value

Multiple Choice

Let's try that last problem together.

I want to evaluate f(x) = x² when x = 3 which means I need to replace my x value with 3.

f(3) = 3²

f(3) = 9

When my input is 3, my output is...

• 3

• 6

• 9