Unit Plan
CK-12 Foundation

Ck 12: Algebra: Comparing Equations of Parallel and Perpendicular Lines

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Use their slopes to determine if two lines are parallel or perpendicular.
Lesson Plan
Oswego City School District

Regents Exam Prep Center: Slopes and Equations of Lines

For Teachers 9th - 10th
Three resources for teaching slopes and equations of lines: a lesson with a formula for finding slope, different equations for lines, and several examples; a fourteen-question quiz covering slope, perpendicular and parallel lines, and...
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Comparing Equations of Parallel and Perpendicular Lines

For Students 9th - 10th
Use their slopes to determine if two lines are parallel or perpendicular.
Activity
Texas Instruments

Texas Instruments: Perpendicular or Parallel?

For Teachers 6th - 8th Standards
Students can use TI 73 calculators to explore equations that create parallel and perpendicular lines. Teacher will use the screen capture feature of the Navigator system to display students graphs and equations to discuss observations to...
Unknown Type
Khan Academy

Khan Academy: Parallel & Perpendicular Lines From Equation

For Students 9th - 10th Standards
Use your knowledge about the slopes of parallel and perpendicular lines to solve some problems. For example, what's the equation of the lineperpendicular to y=3x-3 and passes through the point (-8, -2).
Handout
CK-12 Foundation

Ck 12: Algebra: Lines in the Coordinate Plane Study Guide

For Students 9th - 10th Standards
This comprehensive study guide highlights the main terms and formulas needed to review lines in the coordinate plane. Examples are included.
Handout
Paul Dawkins

Paul's Online Notes: Algebra: Lines

For Students 9th - 10th Standards
Detailed math tutorial features notes and examples that discuss graphing lines and introduces the concept of slope, the standard form of the line, the point-slope form, slope-intercept form, and parallel and perpendicular lines.
Unit Plan
Texas A&M University

Wtamu Virtual Math Lab: College Algebra: Parallel and Perpendicular Lines

For Students 9th - 10th Standards
Given a line, learn how to find the equations for lines that are perpendicular and parallel to it. This tutorial offers several example graphs and problems as well as practice problems for you to work through when you're ready.
Lesson Plan
University of Regina (Canada)

University of Regina: Math Central: Characteristics of a Line

For Teachers 9th - 10th Standards
Characteristics of a line are explained to students through four different lessons. Topics include intercepts, slope, and special line cases. The lessons have an overview, materials, procedures, and evaluation techniques.
Unit Plan
Texas A&M University

Wtamu Virtual Math Lab: Intermediate Algebra: The Slope of a Line

For Students 9th - 10th Standards
This tutorial will show you how to find a the slope of graph, write a linear equation in slope-intercept form. You'll also learn how to determine whether two lines are parallel or perpendicular to each other. For advanced math students.
Handout
CK-12 Foundation

Ck 12: Geometry: Lines in the Coordinate Plane Study Guide

For Students 9th - 10th Standards
This study guide on lines in a coordinate plane covers key terms, what different line slopes look like, postulates about parallel and perpendicular lines, the slope-intercept equation, how to graph parallel and perpendicular lines, and...
Lesson Plan
TeachEngineering

Teach Engineering: Graphing Equations on the Cartesian Plane: Slope

For Teachers 7th - 9th Standards
The lesson teaches students about an important characteristic of lines: their slopes. Slope can be determined either in graphical or algebraic form. Slope can also be described as positive, negative, zero or undefined. Students get an...
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Families of Lines

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Find the equation of a line that is parallel or perpendicular to a given line.
Activity
Texas Instruments

Texas Instruments: Geometry: Parallel and Perpendicular Slopes

For Teachers 9th - 10th Standards
This activity will help students understand the relationship between the slopes of parallel and perpendicular lines.
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Graphing Calculator: Parallel, Perpendicular, Slope, Transversal

For Students 9th - 10th Standards
Practice using your graphing calculator for drawing parallel lines, perpendicular lines, slope, and transversals. If you get stumped or if you would like to check your work, then select the View Solution button, which is located directly...
Activity
Washington State University

Washington State University: Slope Intercept, Point Slope Forms

For Students 9th - 10th Standards
Washington State University provides a lesson on finding the slope of an equation and putting the equation into the desired form. The site also contains informatinon concerning parallel and perpendicular lines.
Activity
Texas Instruments

Texas Instruments: Linear Functions: Slope Intercept Form

For Teachers 9th - 10th
Students learn to develop the equation of a line from its graph. They also learn to write the equation of a line from the slope and the y-intercept, a point and the slope, and two points. They also investigate slopes of lines that are...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Gpe When Are Two Lines Perpendicular?

For Teachers 9th - 10th Standards
The goal of this task is to examine when two lines in the plane are perpendicular in terms of their slopes. Aligns with HSG-GPE.B.5.
Whiteboard
ClassFlow

Class Flow: Slope of Parallel Lines

For Teachers 6th - 8th Standards
[Free Registration/Login Required] This flipchart investigates the idea that linear equations that have the same slope will create parallel lines. We did some samples in class and then students are to predict what happens when equations...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Gpe Slopes and Circles

For Teachers 9th - 10th Standards
The purpose of this task is to lead students through an algebraic approach to a well-known result from classical geometry, namely, that a point X is on the circle of diameter AB whenever angle AXB is a right angle. This consists of...
Activity
Texas Instruments

Texas Instruments: Lines in the Plane

For Teachers 9th - 10th Standards
In this activity, students create a slope triangle and understand the concepts of slope and the equation of lines. They realize that slope is constant at all points along a fixed line. They also explore the slopes of parallel and...
Activity
Texas Instruments

Texas Instruments: Parallel, Perpendicular, Neither

For Teachers 9th - 10th Standards
Students will investigate the relationship of the algebraic slopes of pairs of lines to the graphical relationship between the lines.
Handout
Northeast Parallel Architectures Center, Syracuse University

Npac Reu Program: Slope & Line Equations

For Students 9th - 10th
This site from the Northeast Parallel Architectures Center, Syracuse University has a very substantial discussion of math topics slope & line equations. The outline form is quite useful if you need to zero in on one aspect of...
Activity
Texas Instruments

Texas Instruments: Parallel and Perpendicular Slopes

For Teachers 9th - 10th Standards
This activity is for use as a formative assessment tool after the introduction and overview of parallel and perpendicular slopes.