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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.
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Sample Problems (6)
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Exploring Quadratic Graphs
Problem 1 7,802 viewsMake a table and graph:
y = x² 
Exploring Quadratic Graphs
Problem 2 5,659 viewsMake a table and graph:
y = x² − 2 
Exploring Quadratic Graphs
Problem 3 5,026 viewsMake a table and graph:
y = (x − 3)² + 1 
Exploring Quadratic Graphs
Problem 4 943 views 
Exploring Quadratic Graphs
Problem 5 893 views 
Exploring Quadratic Graphs
Problem 6 867 views
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