Bell ringer 1. What is standard form of a quadratic? 2. What is the graph of a quadratic function called? 3. How do corrective lenses work? Bell ringer

Focus and directrix Friday, October 2, 2015

Equation of a parabola based on focus and directrix The parabola is defined as the locus of a point which moves so that it is always the same distance from a fixed point called the focus and a given line called the directrix. Equation of a parabola based on focus and directrix

Equation of a parabola based on focus and directrix The directrix is the line y = k – p. The focal distance is │p│which is the same distance from the vertex to the focus and from the vertex to the directrix. Equation of a parabola based on focus and directrix

Classwork – Parabola Worksheet Homework – Write the equations for the parabolas given focus and directrix. Practice