Activity
Texas Instruments

Texas Instruments: Writing Equations of Parabolas in Vertex Form

For Teachers 9th - 10th
Students use their knowledge of the vertex form of a quadratic equation to graph parabolas, given a specific move to make.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Identification of Quadratic Models

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Understanding the equations of parabolas
Unknown Type
Khan Academy

Khan Academy: Equation of a Parabola From Focus and Directrix

For Students 9th - 10th Standards
Given the focus and the directrix of a parabola, find its equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
Government of Alberta

Learn Alberta: Math Interactives: Exploring Parabolas and Polynomial Equations

For Students 7th - 9th
This multimedia Learn Alberta math resource looks at how parabolas and polynomial equations are used to study an object's flight path. The accompanying interactive component lets students explore and make comparisons of the flight paths...
Activity
Texas Instruments

Texas Instruments: Curve Fitting for a Parabola

For Teachers 9th - 10th
This is a TI-Navigator Activity Center file that is used as a class warm up or for checking understanding. Students are to contribute an equation of a parabola that will pass through the most number of sunflowers.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Parabolic Equation of an Arch

For Students 9th - 10th
A student, in writing to Dr. Math, wants to know how to find the equation of the parabola of McDonald's arches. Dr. Math helps the student get started with the problem.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Equation of a Parabola

For Students 9th - 10th
Dr. Math, in a reply to a student question, shows how a parabola is just a quadratic equation.
Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Exploring Parabolas

For Teachers 9th - 10th
A lesson plan using the computers to help students understand the various forms of equations of parabola. The site requires students to use the computer and offers a possible assessment of the lesson.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Equations of Conics

For Students 9th - 10th Standards
Posed with a student question about equations of conics, Dr. Math provides some insight on the standard form of parabolas, ellipses, and hyperbolas. One example is shown.
Unit Plan
Other

Algebra Class: Solving and Graphing a Quadratic Equation

For Students 9th - 10th
Math teacher provides a unit on quadratic equations in which she explains the concepts of solving and graphing quadratic equations through numerous examples and graphs. Hyperlinks are available to each step that ultimately leads to...
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Parabola Equation

For Students 9th - 10th Standards
Dr. Math, in a reply to a student's question, describes how to obtain the equation of a parabola.
Handout
Other

Georgia Perimeter College: Parabolas

For Students 9th - 10th
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.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Applying the Definition of a Parabola

For Students 9th - 10th
Dr. Math responds to a student question about parabolas. The student asks a series of questions about a parabola, including how to derive the formula of a parabola from the definition, a parabola is the set of all point equal distance...
Activity
Varsity Tutors

Varsity Tutors: Hotmath: Practice Problems: Systems of Inequalities

For Students 9th - 10th Standards
Hotmath provides 21 practice problems dealing with systems of equations and inequalities. Each of the practice problems include a step-by-step guide for solving their algebraic problem.
Handout
National Council of Teachers of Mathematics

The Math Forum: Parabolas

For Students 9th - 10th Standards
A brief overview on calculating various measures of segments, like focus to vertex and vertex to directix, is given. Additionally, equations of parabolas in general, standard, and vertex forms are listed.
Activity
Discovery Education

Discovery Education: Web Math: Graphing Parabolas

For Students 9th - 10th
WebMath offers a java applet that allows you to input the equation of a parabola, in one of many forms, and gives you a graph of the parabola along with an explanation of how the graph was drawn.
Lesson Plan
University of St. Andrews (UK)

University of St. Andrews: Parabola

For Teachers 9th - 10th Standards
This is a brief lesson plan on the parabola. The lesson plan also has links to related topics.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Rotating Parabolas

For Students 9th - 10th Standards
Dr. Math, in a reply to a student question, shows how to derive the equation of a parabola for situations when the line of symmetry is not || to one of the axes.
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Equation for an Arch

For Students 9th - 10th
A student with a summertime carpenter job asks Dr. Math how to draw an arch. Dr. Math responds by showing how the equation of the parabola can be generated by having three distinct points of the parabola known.
Activity
Texas Instruments

Texas Instruments: Transforming Parabolas

For Teachers 9th - 10th Standards
1. Students will be able to review how to find the vertex of a parabola using a graphing calculator. 2. Students will be able to observe the relationship between the values of a, h and k and the graph of a parabola in vertex form. 3....
Lesson Plan
Alabama Learning Exchange

Alex: Conic Sections: Playing With Parabolas

For Teachers 9th - 10th Standards
Through a mixture of online exploration, and teacher instruction, students will discover how parabolas are formed and will be able to use the key components from a graph (vertex, focus and directrix,) to generate the equation of a graph.
Activity
Texas Instruments

Texas Instruments: Exploring Standard Form of a Quadratic Function

For Teachers 9th - 10th
Students explore y=ax^2+bx+c using the transform graphing application. Teacher calculator is used with Navigator to send device settings, the equation format and initial coefficient values to all students. Worksheet includes all student...
Website
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Parabola Given Three Points

For Students 9th - 10th Standards
This site gives a student a hint of how to determine the equation of a parabola when given three points on the parabola. The Dr. only hints at the solution, encouraging thinking on behalf of the student.
Activity
Texas Instruments

Texas Instruments: Exploring the Parabola and Its Equation Part 1 and @

For Teachers 9th - 10th
Starting with y=x^2 going all the way to (in part 2)y=ax^2+bx+c, how do changes in the quadratic equation/function change the appearance of the parabola.