Like what you saw?
Create FREE Account and:
 Watch all FREE content in 21 subjects(388 videos for 23 hours)
 FREE advice on how to get better grades at school from an expert
 Attend and watch FREE live webinar on useful topics
The Vertex and Axis of Symmetry  Problem 8
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
As with any function in math, you can create a graph by choosing x values to substitute and finding their corresponding y values. This process an be much less labor intensive if you choose your x values in a clever way. Since parabolas have key points around the vertex, if we can find the vertex to begin with and use that as the center of the table, we'll be able to see where the parabola has its turning point. The first step is to use x = b/2a to find the x value of the vertex, and then choose x values on either side of that vertex value. If done correctly, the y values in the table will be symmetric around the vertex. You'll learn more shortcuts with practice.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
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.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
Get Peer Support on User Forum
Peer helping is a great way to learn. Join your peers to ask & answer questions and share ideas.
Concept (1)
Sample Problems (8)
Need help with a problem?
Watch expert teachers solve similar problems.

The Vertex and Axis of Symmetry
Problem 1 5,323 viewsFind the vertex of
f(x) = x² + 6x + 8 
The Vertex and Axis of Symmetry
Problem 2 4,385 viewsFind the vertex of f(x) = x² + 3x + 4. Write the equation for the axis of symmetry.

The Vertex and Axis of Symmetry
Problem 3 3,851 viewsA soccer ball's height in feet follows the path described by h(x) = 48x − 16x² where x is the time in seconds. After how long does the soccer ball reach its maximum height? What is that height?

The Vertex and Axis of Symmetry
Problem 4 616 views 
The Vertex and Axis of Symmetry
Problem 5 694 views 
The Vertex and Axis of Symmetry
Problem 6 537 views 
The Vertex and Axis of Symmetry
Problem 7 683 views 
The Vertex and Axis of Symmetry
Problem 8 716 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete