Identifying a Function

Identifying a Function

Relations

​In math, we have relations! Just like there are relationships in life, we have relationships in math. These are between two variables, like our independent and dependent variables. Here are some examples of relations in math.

​Ordered Pairs

Graph

Mapping

Table

​Mapping Diagram

​The only picture you've likely not seen before from the previous slide is a mapping diagram. A mapping diagram links ordered pairs together using arrows from the input values (x values) to the output values (y values).

Fill in the Blank

Write the ordered pairs for this mapping diagram below.

​Functions

A function is a relation where each input value has only one output value. Or, each x value has only one y value. Let's learn a song that helps us remember this!

​That's Amore = That's a Function

We're going to watch a video that plays the song that we are borrowing the tune from.

​

Then, here are the words to the song we are going to learn:

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​"If the x that you try goes to ONLY ONE Y, that's a FUNCTION!"

Let's Practice!​

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Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Multiple Choice

Is this a function?

• Yes

• No

Poll

Choose your level of understanding F on a scale from 1-4.

• 1 - I don't understand this yet

• 2 - I'm starting to understand this

• 3 - I understand this

• 4 - I could teach my neighbor about this