Quia
Ixl Learning: Slope
Brush up on your math skills relating to slope then try some practice problems to test your understanding.
Visual Fractions
Visual Fractions: Fraction Division With Lines
Once the dividend is correctly identified, a rectangle representing the divisor will appear. The divisor is the horizontal distance of the blue arrow. The program will not continue unless the dividend or the divisor are correctly...
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra
This site is a tutorial for students in algebra 2 or for those who need a refresher. The site has explanations, definitions, examples, practice problems and practice tests are found covering topics such as linear equations, graphing,...
Other
Relationships: Dynamics
The dynamics of shape in art and the relationship of shape with the other elements of art. The effects of angles and lines on perception.
Other
Harold Olejarz: Interactive Horizon Line
An interesting interactive slide show about perspective, including the horizon line and vanishing points.
Curated OER
Science Kids: Science Images: Parallel Lines Cafe Wall Illusion
This famous optical illusion makes the parallel horizontal lines appear to be bent when in fact they are straight. It was originally noticed amongst the tiles of a cafe wall and can now be seen in architecture such as on a large building...
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: When Is a Slope 0 or Undefined?
At this site Dr. Math gives a discussion on the slopes of lines. The Dr. gives an analogy between the slope of a line and walking up and down hills. The Dr. explores the concept of undefined and zero slopes through his response to a...
Other
Art Education: Drawing in One Point Perspective
A fascinating interactive site showing how to use lines in on-point perspective drawings.
Quia
Ixl Learning: Linear Equations
Brush up on your math skills relating to linear equations then try some practice problems to test your understanding.
Oswego City School District
Regents Exam Prep Center: Algebra 2: Definition of Inverse Function
An introductory look at the definition of an inverse function, the notation used for inverse functions, and tests used to determine whether a function will have an inverse. Several examples are provided for the student to scroll through...
ArtLex
Art Lex: Horizon Line
Scroll down to find a definition of horizontal with hyperlinks to other definitions on the site.
Khan Academy
Khan Academy: Distance Between Points: Vertical or Horizontal
Practice finding the distance between two points on the coordinate plane that share the same x- or y-coordinate. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra: Graphing Linear Equations
A simple tutorial that will show you how to graph linear equations and functions after finding the x- and y-intercepts. Provides definitions, steps for sketching a graph, and several examples of linear equations and their graphs....
Washington State University
Washington State University: Graphing Linear Equations
This site explains what a linear equation is, general forms of linear equations, how to graph a line using the method of plotting points. The site also details how to find points on the line given the equation, information about the...
Great Idea Finder
The Great Idea Finder: Television
This site provides an introduction to the ideas behind the invention of television. The site includes a good selection of links to more information and a bibliography.
University of North Carolina
University North Carolina Wilmington: Inverse Functions
Take a look at inverse functions from their definition to graphing them. This site also shows you how to find the inverse of a function.
The Math League
The Math League: Using Data and Statistics
This site contains two short examples of line graphs, charts that show change over time. This is a quick introduction to the topic of statistical graphing.
CK-12 Foundation
Ck 12: Algebra: Graphs of Linear Equations
[Free Registration/Login may be required to access all resource tools.] Students learn to use a table to graph functions recognizing linear equations and the equations of horizontal lines and vertical lines. Students examine guided...
Texas Instruments
Texas Instruments: Defining the Parabola
The teacher will graph a horizontal line and plot a point using TI-Navigator, and the class will provide the points that create a parabola.
Texas A&M University
Wtamu Virtual Math Lab: Beginning Algebra: Intercepts
Learn how to find the x and y intercepts of a linear function, to graph the function using the intercepts, and to graph vertical and horizontal lines. The tutorial offers many examples with clear step-by-step examples.
Birmingham Museums Trust (UK)
Birmingham Museum & Art Gallery: Learning About Landscapes
Take a look at aspects of drawing landscapes from horizontal lines to titles of some landscapes on display in the Birmingham Art Gallery.
Khan Academy
Khan Academy: Mondrian, Composition With Red, Blue, and Yellow
Piet Mondrian's painting, "Composition with Red, Blue, and Yellow", is a collection of rectilinear forms, squares, and rectangles defined by vertical and horizontal lines. His style is called Neo-Plasticism or "The New Plastic Painting"....
ABCya
Ab Cya: 10 X 10 Ice Cream Adventure
10 x 10 is a fun puzzle game for the whole family! Help Mr. Pebbles score points by dragging the ice cream into the grid to fill up vertical and horizontal lines. There are lots of tasty ice cream treats to help you along the way!
Windstream
Ojk's Precalculus Study Page: Reflections and Symmetry
An introduction to the various types of symmetries that can occur in the graphs of functions. Uses vertical, horizontal, and oblique reflections as a means of recognizing symmetries.
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