## Reflection: Writing Across the Disciplines Finding the Inverse of a Function Day 2 of 2 - Section 4: Practice verifying inverses

Here is an example of what a student may write for the last question of Are These Two Fucntions Inverses.

This student does not demonstrate understanding of the question asked. The student's example shows a function that is not its own inverse.  But in the students written work the student only says a function can be its own inverse. If the student had said this to me I would have asked "So you mean that functions are not always their own inverses? How does your example demonstrate your answer?"

The student uses a term "self-inverse" which is not standard terminology but is understood by the student. This is an interesting way to describe the question asked.

Writing Across the Disciplines: Student work

# Finding the Inverse of a Function Day 2 of 2

Unit 2: Functions and Piecewise Functions
Lesson 11 of 15

## Big Idea: Students use composition to justify that two functions are inverses.

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40 minutes

### Katharine Sparks

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