Math Medics
S.o.s. Math: On Inverse Functions With Restricted Domains
Offers a step-by-step explanation of a one-to-one function problem on inverse functions with restricted domains, clearly using the horizontal line test. Includes sample problems.
Lawrence Hall of Science
The Math Page: Topics in Pre Calculus: The Slope of a Straight Line
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...
Lawrence Hall of Science
The Math Page: Skill in Algebra: The Slope of a Straight Line
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...
Cool Math
Coolmath: More on Tangent Lines
This CoolMath resource provides instruction and practice for tangent lines.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Slope of a Line
Find a quick, concise explanation of how to find the slope of a line. Examples are given and clearly explained.
Other
Desmos: Put the Point on the Line
In this activity, students investigate slope and how it can be explained as a ratio of change between the vertical and horizontal coordinates.
Curated OER
Science Kids: Science Images: Vertical and Horizontal Line Length Illusion
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...
ArtLex
Art Lex: Line
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...
CK-12 Foundation
Ck 12: Algebra: Horizontal and Vertical Line Graphs
[Free Registration/Login may be required to access all resource tools.] Learn how to graph horizontal and vertical linear equations.
Khan Academy
Khan Academy: Horizontal & Vertical Lines
Practice your knowledge of horizontal and vertical lines: their graphical presentation, their slopes, and their equations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive...
CK-12 Foundation
Ck 12: Algebra: Horizontal and Vertical Line Graphs
[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.
CK-12 Foundation
Ck 12: Analysis: Vertical and Horizontal Transformations
[Free Registration/Login may be required to access all resource tools.] Introduction to function transformations, including vertical and horizontal shifts.
BBC
Bbc: Skillswilse: The Number Line
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...
National Institute of Educational Technologies and Teacher Training (Spain)
Ministerio De Educacion: Geo Gebra Prim (Conexiones Misteriosas)
Challenge yourself with this puzzle. Try to connect the dots of the same color with horizontal and vertical segments without leaving the grid and without crossing the lines.
Texas Instruments
Texas Instruments: Cabri Jr. The Equation of a L Ine
This activity uses Cabri Jr. to graph a line and show the equation of the line. The equations for oblique, horizontal and vertical lines are explored with emphasis on slope and y-intercept.
Texas Instruments
Texas Instruments: Parallel Horses
Using the activity center and the Navigator software, the students will review ordered pairs, and the equations for horizontal, parallel, and perpendicular lines.
Other
Linear Functions, Slope and Regressions
Find activities here for linear functions, slopes and regression lines. Use them for classroom work or individual assignments.
Sophia Learning
Sophia: Find Slope and Rate of Change
This learning tutorial demonstrates how to find the slope of a line and the rate of change for a table. The lesson includes several PowerPoint presentations about slope and even provides practice problems for students to test their...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Equation of a Line Parallel to an Axis
Dr. Math gives a short discussion on how to find the equation of a line parallel to an axis (, parallel or horizontal.)
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Horizontal and Vertical Asymptotes
Dr. Math answers 'why would a line cross a horizontal asymptote?'.
Discovery Education
Discovery Education: Web Math: Using a Number Line
This WebMath site provides an interactive number line "solver." Content includes helpful hint and a full explanation of the mathematical solution.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: General Linear Equation
This site by the Northeast Parallel Architecture Center, Syracuse University, shows the different forms of linear equations for a line.
Sophia Learning
Sophia: Finding the Slope When Given Two Points
When given two ordered pairs, find the slope of a line. Includes video.
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