# Lesson 2

Understanding Points in Situations

These materials, when encountered before Algebra 1, Unit 4, Lesson 2 support success in that lesson.

### Lesson Narrative

In this lesson, students compute the value of $$y$$ when given the value for $$x$$ in linear equations. In another activity, students interpret similar values in a given situation and think about values that do not make sense for the variables in that situation. In the associated Algebra 1 lesson, students are introduced to function notation and interpret points in situations. Students are supported by doing almost the same work in this lesson using equations with $$x$$ and $$y$$ so that they may focus on the new function notation in Algebra 1.

Students reason abstractly and quantitatively (MP2) when they interpret values in the given situations.

### Learning Goals

Teacher Facing

• Compute the value of a variable given a value for another variable.
• Understand a function and specific values in a situation.

### Student Facing

• Let’s understand points on a function in a situation.

Building Towards