Objective

About This Lesson

Opener: How can you solve problems on a graph?

Problems #1-4: Navigating a Graph on Desmos

Problems #6-8: Finding and Interpreting an Intersection of Two Lines

Problems 9 to 11: Plotting Solutions to an Equation with Two Unknowns

Problem #12: Find the Line that Fits!

Summary

Introduction to Desmos

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Objective

SWBAT graph systems of equations and linear functions on an online graphing calculator.

Big Idea

Knowing how to use powerful computing tools and how to interpret the solutions they yield will go a long way both in and beyond this course.

Lesson Author

James Dunseith

Worcester, MA

Grade Level

Ninth grade

Subjects

Math

graphing linear functions

Algebra

Patterns (Algebra)

Standards

HSA-CED.A.2

Create equations in two or more variables to represent relationships between quantities; graph equations on coordinate axes with labels and scales.

HSA-REI.C.6

Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.

HSA-REI.D.10

Understand that the graph of an equation in two variables is the set of all its solutions plotted in the coordinate plane, often forming a curve (which could be a line).

HSF-IF.C.7a

Graph linear and quadratic functions and show intercepts, maxima, and minima.

MP4

Model with mathematics.

MP5

Use appropriate tools strategically.

About This Lesson

Today's lesson takes place in the computer lab. Students will learn to use Desmos, which is an online graphing calculator.

As they move through today's lesson, students will be working on problems from this Equivalent Line Segments handout, which was first assigned during yesterday's class, and everyone should be at least partially done with it. They will move through a series of problems presented on today's agenda, which is hosted on my class Wordpress site. Click here to see the lesson on Wordpress.

Here, I'm sharing this lesson in a series of video narratives. You can start with this introduction and then move through each section of the lesson. Please feel free to share your feedback, comments and questions, and thanks for looking!