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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.
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Sample Problems (6)
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Exploring Quadratic Graphs
Problem 1 7,661 viewsMake a table and graph:
y = x² 
Exploring Quadratic Graphs
Problem 2 5,569 viewsMake a table and graph:
y = x² − 2 
Exploring Quadratic Graphs
Problem 3 4,947 viewsMake a table and graph:
y = (x − 3)² + 1 
Exploring Quadratic Graphs
Problem 4 883 views 
Exploring Quadratic Graphs
Problem 5 832 views 
Exploring Quadratic Graphs
Problem 6 788 views
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