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INSTRUCTORSCarleen EatonGrant Fraser
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For more information, please see full course syllabus of Algebra 2
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Lecture Comments (1)

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Post by Mark Mccraney on January 9, 2010

11:04 shouldn't the equation be y=a(x-K)^2+h? Horizontal parabolas have transposed h and k in the formula?


  • Understand the geometric significance of the sign of the coefficient of the squared term in the equation of a parabola.

  • Use the axis of symmetry to help you graph a parabola.

  • Know the standard formula for a parabola.

  • Review how to complete the square.

  • If the coefficient of the squared term is not 1, then before completing the square, you must first factor this coefficient out of both the squared term and the linear term.


Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • What is a Parabola? 0:21
    • Focus and Directrix
    • Axis of Symmetry
  • Vertex 2:03
    • Example
  • Standard Form 3:11
    • Upward and Downward
  • Graphing Parabolas 5:24
    • Example
  • Latus Rectum 7:37
  • Horizontal Parabolas 9:10
  • Focus and Direction 12:31
  • Lecture Example 1 13:11
  • Lecture Example 2 16:46
  • Additional Example 3
  • Additional Example 4