3-5 Function Notation

Multiple Choice

What is function notation?

• an equation that represents nothing

• an equation that represents functions

• an equation that represents notations

• an equation that represents numbers

​Function Notation

Equations that represent functions are often written in function notation.

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What do you see that changed?​

• this is read as f of x equals....​

• f(x) is the output and x is the input​

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Where have we seen input and output?​

​Evaluating Functions

Functions notation is especially useful for finding a value in the range that corresponds to a certain domain value.

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Example: If f(x) = ​4x - 1, find f(-7)

How do you think that we could set this up? Take a moment and private think time​.

​Evaluating Given a Graph

​Search and find

Given a graph you can find any f(x) or other fuction of y. You must remember that ​y is f(x). Remember that the x in f(x) is x.

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