Posts Tagged ‘focus’
Thursday, October 15th, 2009
How to Find the Directrix of a Parabola
Description
A detailed tutorial on how to find the directrix of a parabola. Step by step tutorial including several examples of how to find the directrix of a parabola for reference.
Overview
A parabola is a curved shape that is formed by the graph of the function x squared. A parabola is technically known as the locus of points where the distance to the focus equals the distance to the directrix. The directrix is a given line on a parabola that does not go through the focus.
Tags: algebra, curve, directrix, focus, function, graph, line, locus, Math, parabola, points, squared, x
Posted in Algebra | No Comments »
Friday, October 9th, 2009
Introduction to Linear Regression
Description
A detailed tutorial on linear regression. Step by step tutorial including several example problems of linear regression for reference.
Overview
Regression is a type of analysis that is used for analyzing several variables when the focus is on a dependent variable and one or more independent variables. Linear regression is when the dependent variable is a linear combination of the parameters. It can be used for both straight lines and parabolas, and each has a different formula.
Straight Line: 
Parabola: 
Tags: algebra, analyzing, combination, dependent, focus, independent, line, linear, Math, parabola, parameters, regression, straight, variable
Posted in Algebra | No Comments »
Tuesday, September 29th, 2009
Definition of a Hyperbola
Description
A detailed tutorial of the definition of a hyperbola. Step by steo tutorial including several examples of the definition of a hyperbola for reference.
Overview
A hyperbola is similar to a parabola, but there is one difference – the hyperbola has two branches. You can think of it in the 2D form as a concave up parabola on top of a concave down parabola. Many people refer to the hyperbola as the “bow” because that is what it resembles. Like the parabola, a hyperbola is caused by the intersection of a conical surface and a plane.
Tags: concave, conic, conical surface, curve, focus, Geometry, graph, hyperbola, intersect, Math, parabola, plane
Posted in Geometry | No Comments »
Tuesday, September 29th, 2009
Definition of a Parabola
Description
A detailed tutorial of the definition of a parabola. Step by step tutorial including a visual example of the definition of a parabola for reference.
Overview
A parabola is an elongated curve that is used often in graphing. A parabola is formed by the graph of y = x^2, and its traditional form is concave up. Technically, the parabola is actually a conic section, which is the intersection of a conical surface and a plane parallel to the generated straight line of that surface.
Tags: concave, conic, conical surface, curve, focus, Geometry, graph, intersect, Math, parabola, plane, y=x^2
Posted in Geometry | No Comments »
