# Lesson 4

Interpreting Functions

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

### Lesson Narrative

In this lesson, students interpret functions in context. First, they concentrate only on connecting an equation to the situation. Then in the next activity, they incorporate a graphical representation of the situation. In the associated Algebra 1 lesson, students use additional representations, such as tables, to connect to the situation. Students are supported for that work by slowly introducing additional representations so they can focus on the new information more slowly.

Students must reason abstractly and quantitatively (MP2) when they interpret functions in situations and connect representations.

### Learning Goals

Teacher Facing

- Interpret functions in situations using equations and graphs.

### Student Facing

- Let’s interpret some functions.

### CCSS Standards

Building Towards