Unit Plan
Texas Education Agency

Texas Gateway: Writing Equations of Lines

For Students 9th - 10th
Given two points, the slope and a point, or the slope and the y-intercept, the student will write linear equations in two variables.
Handout
Other

Bila, Egan and Palay: Standard Form for Linear Equations

For Students 9th - 10th
This in-depth look at the standard form shows how equations are put into standard form. There are several great examples with clear explanations.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: The Intersection of Two Lines

For Teachers 8th Standards
The purpose of this task is to introduce students to systems of equations. It takes skills and concepts that students know up to this point, such as writing the equation of a given line, and uses it to introduce the idea that the...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A rei.c.6: Accurately Weighing Pennies I

For Teachers 9th - 10th
In this problem, students will use the number of decimal places in the coefficients to motivate writing and solving a system of equations. Aligns with A-REI.C.6.
Graphic
Purple Math

Purplemath: Solving Inequalities: An Overview

For Students 9th - 10th Standards
A discussion on how to solve linear and nonlinear inequalities is presented. Both the Test Method and the Factor Method of checking positive/negative intervals are included as part of the discussion.