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Exploring Quadratic Graphs  Problem 6
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
If we have a table of values as our only information about a quadratic function, we can still determine many key features. As always, the y intercept is the point where the xvalue is zero. The xintercepts (there could be zero, one, or two) are the point(s) where the yvalue is zero. If you imagine a parabola graph, you know that the vertex represents either the highest yvalue or the lowest yvalue, depending on whether the parabola opens up or down. Look for a change in the y values from increasing to decreasing (or visaversa) to locate the vertex.
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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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Sample Problems (6)
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Exploring Quadratic Graphs
Problem 1 7,468 viewsMake a table and graph:
y = x² 
Exploring Quadratic Graphs
Problem 2 5,431 viewsMake a table and graph:
y = x² − 2 
Exploring Quadratic Graphs
Problem 3 4,812 viewsMake a table and graph:
y = (x − 3)² + 1 
Exploring Quadratic Graphs
Problem 4 796 views 
Exploring Quadratic Graphs
Problem 5 743 views 
Exploring Quadratic Graphs
Problem 6 699 views
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