# Lesson 17

Interpreting Function Parts in Situations

These materials, when encountered before Algebra 1, Unit 4, Lesson 17 support success in that lesson.

### Lesson Narrative

In this lesson students use a given linear function to describe a situation then write functions to represent situations. In the associated Algebra 1 lesson students use inverses to find information about situations. This lesson supports students by drawing strong connections between the situation descriptions and the function so that students can focus on the relationships with the inverse in the Algebra 1 lesson.

Reasoning abstractly and quantitatively (MP2) is essential for understanding the functions in terms of the situations given.

### Learning Goals

Teacher Facing

- Describe a situation based on a given function.
- Write a function based on the description of a situation.

### Student Facing

- Let’s pick apart functions

### CCSS Standards

Building Towards