Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

Thank you for watching the video.

To unlock all 5,300 videos, start your free trial.

Graphing Quadratic Equations - Problem 11

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

Share

There are five key points that can often be enough to sketch a parabolic function: the y intercept, x intercept(s), vertex, and reflection of the y-intercept across the axis of symmetry. Here we find the vertex of a parabola from vertex form and sketch it along with the vertical axis of symmetry. In this case, the vertex happens to be the only x-intercept. The y-intercept can always be found by letting x = 0 in the function. A fifth point rounds out the symmetry when the y-intercept is reflected across the axis of symmetry line. We connect these points to get a sketch of the parabola. Here is a situation where our "5 point" method of graphing is only a "3 point" method.

Transcript Coming Soon!

© 2023 Brightstorm, Inc. All Rights Reserved. Terms · Privacy