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Exploring Quadratic Graphs  Problem 5
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
In exploring parabolas, we find that the all have a lot of key features in common: they all are symmetric around a vertical line that has the equation x = b/2a. It is called the axis of symmetry. If you plug that x value back into the function, you get the ycoordinate of the vertex. The vertex is always the maximum or minimum yvalue on a parabola. The vertex is particularly important in quadratic word problems. The y intercept is always the point when x is zero. The xintercept(s) are found when y is zero using a variety of possible methods. There could be zero, one, or two xintercepts.
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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.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
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Sample Problems (6)
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Exploring Quadratic Graphs
Problem 1 7,469 viewsMake a table and graph:
y = x² 
Exploring Quadratic Graphs
Problem 2 5,432 viewsMake a table and graph:
y = x² − 2 
Exploring Quadratic Graphs
Problem 3 4,814 viewsMake a table and graph:
y = (x − 3)² + 1 
Exploring Quadratic Graphs
Problem 4 797 views 
Exploring Quadratic Graphs
Problem 5 743 views 
Exploring Quadratic Graphs
Problem 6 700 views
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