## Reflection: Adjustments to Practice What is a Function? - Section 2: Introduction + Guided Practice

Mathematical Language → In this lesson I am sure to relay the idea of functions through careful questioning and probing regarding the input and output. For example, when describing ordered pairs aloud {(2,3)(4,8)}, I am sure to say “When you input 2, 3 is the output”, “When you input 4, 8 is the output”.

Additionally, I am very careful to make sure that students don’t condense the class material into a “rule” (If the x values repeat it’s not a function), and rather that they focus on the reasonability and reliability of a function with two different outputs. This focus on their mathematical thinking will support the work we will continue to do with functions as we continue on in this unit.

Language

# What is a Function?

Unit 2: Linear & Absolute Value Functions
Lesson 1 of 10

## Big Idea: Students will identify whether a relation is a function by examining its inputs and outputs or with the vertical line test.

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75 minutes

### Noelani Davis

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