 Parabola: set of all points in a plane that are the same distance from a fixed line & a fixed point not on the line  Focus: that fixed point; lies.

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 Parabola: set of all points in a plane that are the same distance from a fixed line & a fixed point not on the line  Focus: that fixed point; lies on the axis of symmetry  Directix: that fixed line; perpendicular to the axis of symmetry  Vertex: lies halfway between the focus & directix

 In chapter 5, all parabolas opened up or down with a vertical axis of symmetry  Look at bottom of page 595 togeter

EquationFocusDirectixAxis of Sym.Opens VerticalUp or Down Horiz.Left or Right

 Identify the focus & directix of the parabola given by. Draw the parabola  Write the equation of the parabola show  HW: p #16-37all, 38-76even