en.wikipedia.org/wiki/Parabola

A parabola is a two-dimensional, mirror-symmetrical curve, which is
approximately U-shaped when oriented ...

www.purplemath.com/modules/parabola.htm

Introduces the terms and equations related to parabolas in the context of conics.
Relates ... Show how to 'read' from the 'conics' form of the parabola equation.

jwilson.coe.uga.edu/emt725/class/sarfaty/emt669/instructionalunit/parabolas/parabolas.html

Lesson 3: Find the equation of our parabola when we are given the coordinates
of ... Lesson 4: Find the vertex, focus, and directrix, and graph a parabola by first ...

www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php

The standard and vertex form equation of a parabola and how the equation
relates to the graph of a parabola.

www.khanacademy.org/math/algebra2/intro-to-conics-alg2/focus-and-directrix-of-a-parabola-alg2/v/equation-for-parabola-from-focus-and-directrix

The equation of a parabola is derived from the focus and directrix, and then the
general formula is used to solve an example.

www.khanacademy.org/math/algebra2/intro-to-conics-alg2/focus-and-directrix-of-a-parabola-alg2/e/equation-of-parabola-from-focus-and-directrix

Given the focus and the directrix of a parabola, find its equation.

www.softschools.com/math/calculus/writing_the_equation_of_parabolas/

Writing the Equation of Parabolas. To write the equation of a parabola.... 1.
Determine which pattern to use (based on whether it is horizontal or vertical) 2.

www.csun.edu/~ayk38384/notes/mod11/Parabolas.html

Parabolas. The graph of a quadratic equation in two variables (y = ax<sup>2</sup> + bx + c )
is called a parabola. The following graphs are two typical parabolas their ...

www.sciencehq.com/math-formulas/formulas-for-parabola.html

Formulas for Parabola. Parabola is a Greek word which refers to a particular
plane curve. In general words, parabola can also be define as a plane curve of
the ...

www.analyzemath.com/parabola/Equation.html

This is an applet to explore the equation of a parabola and its properties. The
equation used is the standard equation that has the form ...