National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Line Problems
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....
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Graph of Circle as a Function
Dr. Math, in a reply to a student question, describes how a circle can be a function.
CK-12 Foundation
Ck 12: 3.3 Inverse Functions
This section explores the process for finding inverses of functions, and then proving the function and its inverse algebraically. Additionally, it explores how the graphs of functions and their inverses compare to each other, and it...
Texas Instruments
Texas Instruments: Relations and Functions
A function is a relation that assigns exactly one value of the dependent variable to each value of the independent variable. When a function is graphed, a vertical line can pass through the graph and touch only one point.
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...
CK-12 Foundation
Ck 12: Algebra: Algebraic Functions
[Free Registration/Login may be required to access all resource tools.] In this lesson students determine if a given relation or graph is a function. Students watch a video tutorial, examine guided notes and attempt practice problems.
Purple Math
Purplemath: Functions Versus Relations
This lesson offers a thorough explanation of functions, domain and range, and how to find them. Includes multiple example problems and graphs. Great review tool for Algebra students.
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Slope & Line Equations
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...
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.
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...
Texas A&M University
Wtamu Virtual Math Lab: Intermediate Algebra: Introduction to Functions
This introductory tutorial on functions offers important definitions, examples of functions, and practice exercises for you to complete and check.
Houghton Mifflin Harcourt
Houghton Mifflin Harcourt: Saxon Activity Center: Real World Investigation: Elevation Changes [Pdf]
Math and geography are the focus of this internet investigation. Learners must plan a road trip to several cities and plot the elevations of those cities using a line graph. Acrobat Reader required.
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.
PBS
Pbs Learning Media: Math + Arts: The Absolute Value of Dance
In this lesson, students use a graph to choreograph a dance figure. Media resources and teacher materials are included.
Texas Instruments
Texas Instruments: Implicit Differentiation
Students differentiate an equation in two variables with respect to one. They calculate points where the tangent line is horizontal, vertical, or oblique and use the graphing capacity of the TI-89 to display the graph of the implicit...
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.
Other
Georgia Perimeter College: Parabolas
This resource provides an examination of parabolas, both vertical and horizontal, and parabolic functions. It includes six examples and a chart showing how changes in the equation coincide with changes in the graph.
CK-12 Foundation
Ck 12: Analysis:
[Free Registration/Login may be required to access all resource tools.] Definition of a function and how to identify a function.