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Handout
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Horizontal Lines

For Students 9th - 10th Standards
Find a quick, concise explanation of equations of horizontal lines. An example is given and clearly explained for equations of both horizontal and vertical lines.
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Unit Plan
Cuemath

Cuemath: Lines

For Students 3rd - 8th Standards
Learn all about lines. This lesson targets what is a line and the different types. Check-out the interactive simulations to know more about the lesson and try your hand at solving a few interesting practice questions at the end of the page.
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Website
Cool Math

Coolmath: Pre Calculus Horizontal and Vertical Lines Review

For Students 9th - 10th
This CoolMath resource provides a review of horizontal and vertical lines.
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Activity
Texas Instruments

Texas Instruments: Ordered Pair (Month, Day)

For Teachers 6th - 8th
Students will contribute points in the form of a significant date. (month, day). They will look for vertical and horizontal patterns. Study the list for similiarities and then discover the equation for vertical and horizontal lines.
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Unit Plan
University of North Carolina

University of North Carolina Wilmington: Lines in a Plane

For Students 9th - 10th Standards
This site from the University of North Caroline at Wilmington provides great information on the lines in a plane. The information that is given is in-depth and complete, touching on the slope of a line, equations of lines, and linear...
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Unit Plan
Sophia Learning

Sophia: The Number Line

For Students 6th - 8th Standards
This video lesson introduces the number line.
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Activity
Cool Math

Coolmath: Horizontal and Vertical Lines

For Students 6th - 8th Standards
A short tutorial explaining the linear equations of horizontal and vertical lines.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Horizontal and Vertical Line Graphs

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn how to graph horizontal and vertical linear equations. Students watch videos, review guided notes and attempt practice problems.
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Activity
Purple Math

Purplemath: Slope of a Straight Line

For Students 9th - 10th Standards
This lesson on slope explains the slope concepts, demonstrates how to use the slope formula, shows how to find slope in horizontal and vertical lines, and how to use slope to find whether the lines through the pairs of points are...
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Handout
Math Open Reference

Math Open Reference: Points and Lines

For Students 9th - 10th Standards
A complete reference guide to points, lines, and planes. It provides definitions and interactive activities that enhance further explanation.
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Unit Plan
Shmoop University

Shmoop: Basic Algebra: Graphing Horizontal and Vertical Lines

For Students 9th - 10th Standards
The tutorial discusses horizontal and vertical lines. Learners explore the concepts through notes and examples.
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Unit Plan
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Line Problems

For Students 9th - 10th Standards
This site answers many general questions about linear equations and their graphs. A student posed several questions to Dr. Math regarding lines and their equations. Question number 4 is about the equation of a horizontal line and Dr....
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Activity
Lawrence Hall of Science

The Math Page: Topics in Pre Calculus: The Slope of a Straight Line

For Students 9th - 10th
Here is a site that clearly and thoroughly explains the slope of a line. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who have been absent or...
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Unit Plan
BBC

Bbc: Skillswilse: The Number Line

For Students 3rd - 8th Standards
This Skillswise site focuses on number lines. Included is a video about how to use number lines, fact sheets and worksheets for instruction, and quizzes on the information presented. Be aware that this is from Great Britain, so any games...
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Unit Plan
CK-12 Foundation

Ck 12: Analysis: Vertical and Horizontal Transformations

For Students 11th - 12th
[Free Registration/Login may be required to access all resource tools.] Introduction to function transformations, including vertical and horizontal shifts.
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Unit Plan
Lawrence Hall of Science

The Math Page: Skill in Algebra: The Slope of a Straight Line

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains many topics surrounding the slope of a line, including slope of horizontal, vertical, parallel, and perpendicular lines in addition to the formula and concept of slope. There are...
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Activity
Discovery Education

Discovery Education: Web Math: Using a Number Line

For Students 9th - 10th Standards
This WebMath site provides an interactive number line "solver." Content includes helpful hint and a full explanation of the mathematical solution.
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Activity
Varsity Tutors

Varsity Tutors: Hotmath: Algebra Review: Slope of a Line

For Students 9th - 10th Standards
Find a quick, concise explanation of how to find the slope of a line. Examples are given and clearly explained.
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Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Horizontal and Vertical Asymptotes

For Students 9th - 10th Standards
Dr. Math answers 'why would a line cross a horizontal asymptote?'.
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Activity
Other

Desmos: Put the Point on the Line

For Students 6th - 8th Standards
In this activity, students investigate slope and how it can be explained as a ratio of change between the vertical and horizontal coordinates.
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Graphic
Curated OER

Science Kids: Science Images: Vertical and Horizontal Line Length Illusion

For Students 9th - 10th
This is a vertical and horizontal line length optical illusion. The vertical line that is part of the image on the left looks longer than the horizontal line but when it is checked with a ruler on the right image it is proved that they...
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Handout
ArtLex

Art Lex: Line

For Students 9th - 10th
This online dictionary of art terms from Artlex is a valuable tool. Line is on the Li page. Just scroll down to Line and read a definition with links or look at a sample works of art by Rembrandt or Richard Long. There are quotes by...
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Horizontal and Vertical Line Graphs

For Students 8th - 9th Standards
[Free Registration/Login may be required to access all resource tools.] Learn how to graph horizontal and vertical linear equations.
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Unit Plan
CK-12 Foundation

Ck 12: Algebra: Horizontal and Vertical Line Graphs

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Write and graph lines of the form y = a constant value and x = a constant value.

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