11 Videos for "directrix"

Focus and Directrix of a Parabola  Concept
Math › Algebra 2 › Quadratic Equations and Inequalities
How to define the focus and directrix of a parabola. 
Focus and Directrix of a Parabola  Problem 1
Math › Algebra 2 › Quadratic Equations and Inequalities
How to find the equation of a parabola given the focus and directrix. 
Focus and Directrix of a Parabola  Problem 2
Math › Algebra 2 › Quadratic Equations and Inequalities
How to find the focus and directrix of a parabola in standard form. 
Focus and Directrix of a Parabola  Problem 5
Math › Algebra 2 › Quadratic Equations and Inequalities
Finding the focus and directrix and sketch of a parabola that opens vertically from the equation 
Focus and Directrix of a Parabola  Problem 3
Math › Algebra 2 › Quadratic Equations and Inequalities
Using the focus or vertex and directrix to write the equation for a parabola that opens horizontally 
Focus and Directrix of a Parabola  Problem 7
Math › Algebra 2 › Quadratic Equations and Inequalities
Finding the focus and directrix of a parabola that opens horizontally from the equation 
Focus and Directrix of a Parabola  Problem 6
Math › Algebra 2 › Quadratic Equations and Inequalities
Writing the equation for a parabola that opens vertically in standard form and identifying the focus and directrix 
Focus and Directrix of a Parabola  Problem 10
Math › Algebra 2 › Quadratic Equations and Inequalities
Writing the equation for a parabola that opens horizontally in standard form and identifying the focus and directrix 
Focus and Directrix of a Parabola  Problem 9
Math › Algebra 2 › Quadratic Equations and Inequalities
Using the focus or vertex and directrix to write the equation for a parabola that opens vertically 
Focus and Directrix of a Parabola  Problem 8
Math › Algebra 2 › Quadratic Equations and Inequalities
Using a parabola to model a light fixture 
Focus and Directrix of a Parabola  Problem 4
Math › Algebra 2 › Quadratic Equations and Inequalities
Example of modeling a projectile's path using a parabolic section