Math Open Reference
Math Open Reference: Intersection of Two Straight Lines
Learn about the intersection of two straight lines with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhance further explanation. Includes links to related topics.
Illustrative Mathematics
Illustrative Mathematics: A rei.d.10: Collinear Points
This task leads students through a series of problems which illustrate a crucial interplay between algebra and geometry. Aligns with A-REI.D.10.
Cool Math
Coolmath: Perpendicular Lines
This CoolMath Resource will help students determine if lines are perpendicular by finding the slope, using the point-slope formula, and graphing.
CK-12 Foundation
Ck 12: Algebra: Determining the Equation of a Line
This comprehensive study guide highlights the main terms and formulas needed to determine the equation of a line. Examples are included.
Other
Technical Tutoring: Linear Functions and Straight Lines
Learn how to write equations for linear functions in all three forms: point-slope, slope-intercept, and general. Also look at equations for parallel and perpendicular. The page gives an explanation of how to obtain the point slope form...
Sophia Learning
Sophia: Slope Intercept Form and Direct Variation: Lesson 2
This lesson relates slope-intercept form to slope and direct variations. It is 2 of 4 in the series titled "Slope-Intercept form and Direct Variation."
Sophia Learning
Sophia: Slope Intercept Form and Direct Variation: Lesson 4
This lesson relates slope-intercept form to slope and direct variations. It is 4 of 4 in the series titled "Slope-Intercept form and Direct Variation."
Sophia Learning
Sophia: Slope Intercept Form and Direct Variations
This lesson relates slope-intercept form to slope and direct variations.
CK-12 Foundation
Ck 12: Algebra: Applications Using Linear Models
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn how to use various forms of linear equations to solve problems. Students watch a video tutorial, explore guided notes and attempt...
Texas Instruments
Texas Instruments: Investigating Equations of Lines
In this activity, students explore the equations of lines written in the form: y = mx + b. They move points defining the lines, and view the related changes in the parameters of the equations.
CK-12 Foundation
Ck 12: Algebra: Linear Inequalities in Two Variables
[Free Registration/Login may be required to access all resource tools.] Solve and graph linear inequalities in two variables on the coordinate plane.
Texas Instruments
Texas Instruments: Using the Transform Application in an Algebra Class
This activity is intended to be a discovery activity for students to determine the effect that changing m and b have on the equation y=mx+b. There is a teacher guide and an activity to determine the student's level of understanding.
Khan Academy
Khan Academy: Domain of Modeling Functions
In this exercise, students practice identifying the domain of modeling functions. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Checking Solutions to Two Variable Linear Equations
In this exercise, students practice checking solutions to two-variable linear equations. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Texas Instruments
Texas Instruments: Symbolic Study of Lines
Students will write an equation in slope-intercept form given two points on the line; write an equation in Ax + By = C form given slope and one set of coordinates; and prove lines to be parallel or perpendicular given vertices of...
Interactive Mathematics
Interactive Mathematics: Graphs of Linear Functions
A brief overview of three methods used to graph lines is presented through examples. Slope-intercept, point-slope, and intercept form are demonstrated step-by-step along with a review of the formula for finding the slope of a line.
Learning Wave Communications
Learning Wave: Algebra, Section 2
The basic concepts of graphing are covered on this site, including points, slopes, equations of lines, and y-intercept. A quick discussion on the Pythagorean Theorem is also concluded. Several practice and application problems are...
Paul Dawkins
Paul's Online Notes: Algebra Cheat Sheet [Pdf]
An algebra "cheat sheet" to use as a reference when completing algebra homework. Lists basic facts, properties, operations, formulas, and functions, as well as common errors.
University of Regina (Canada)
University of Regina: Math Central: Writing Linear Equations
Three different lessons demonstrate how to write linear equations. The equations found from two points, slope and a point, and slope and y-intercept are all featured. The lessons have an overview, materials, procedures, and evaluation...
University of Regina (Canada)
University of Regina: Math Central: Writing Linear Equations
Three different lessons demonstrate how to write linear equations. The equations found from two points, slope and a point, and slope and y-intercept are all featured. The lessons have an overview, materials, procedures, and evaluation...
University of Regina (Canada)
University of Regina: Math Central: Writing Linear Equations
Three different lessons demonstrate how to write linear equations. The equations found from two points, slope and a point, and slope and y-intercept are all featured. The lessons have an overview, materials, procedures, and evaluation...
Texas Instruments
Texas Instruments: Step Up
Students learn to use measurements on a real model to develop the concept of slope and linear functions. They use a calculator to explore changing the slopes and Y- intercepts in the slope intercept form Y = MX + B.
Illustrative Mathematics
Illustrative Mathematics: 8.ee Find the Change
In this task, 8th graders work with linear functions and learn how to discuss and make calculations with slope and x- and y-intercepts. Aligns with 8.EE.B.
CK-12 Foundation
Ck 12: Algebra: Graphing Linear Equations
This comprehensive study guide highlights the main terms and formulas needed to review graphing linear equations. Examples are included.