# Lesson 9: Spaghetti Line

## Lesson 9: The Spaghetti Line

### Objective:

Students will estimate the line of best fit for a height and arm span dataset using a strand of spaghetti as a modeling tool.

### Materials:

1. The Spaghetti Line handout (LMR_4.10_The Spaghetti Line)

Note: Advance preparation is required. Cut out plots prior to beginning the lesson.

2. 1 lb. of Uncooked Spaghetti

3. Grid Paper

4. Tape or Glue

5. Poster paper

### Essential Concepts:

Essential Concepts:

We can often use a straight line to summarize a trend. “Eyeballing” a straight line to a scatterplot is one way to do this.

### Lesson:

Note: Lab 4A may be done in the same class period as this lesson.

1. Inform students that in this lesson, they will estimate the equation of the line of best fit for a height and arm span dataset.

2. Distribute The Spaghetti Line handout(LMR_4.10_The Spaghetti Line) to each student and a couple of spaghetti strands per team. Students will estimate the line of best fit as outlined in the handout. Team solutions should be recorded on poster paper. They will glue their assigned plot on the poster and record their responses to the questions on the poster paper.

Note to teacher: If necessary, review how to find the slope of a line using two points and how to write an equation using the slope and y-intercept.

3. Ask teams to post their work around the room. Conduct a Gallery Walk so that teams can see each other’s work.