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The Vertex and Axis of Symmetry  Problem 4
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
The vertex of a parabola always gives either the maximum y value (if the parabola opens down) or minimum value (if the parabola opens up.) The vertex also lies along the vertical axis of symmetry. To find the vertex, here in the context of the maximum height that an object attains, you could either complete the square or use t = b/2a. Here we use the second method to find the vertical axis of symmetry, and then plug that time value to plug back in and find the maximum height. This method can be extended to any maximum (like profit, sales, area etc.) or minimum (like cost).
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
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The Vertex and Axis of Symmetry
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The Vertex and Axis of Symmetry
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The Vertex and Axis of Symmetry
Problem 4 648 views 
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