# Determine the equation of the line of symmetry of the quadratic function ?

• Nov 27th 2009, 10:45 AM
eliteplague
Determine the equation of the line of symmetry of the quadratic function ?
Determine the equation of the line of symmetry of the quadratic function given bellow.
https://ce6.howardcc.edu/webct/Relat...1/image002.gif
The equation of the line of symmetry is of the form x = k. What is the value of k?

How do I go about solving this?

-Thanks
• Nov 27th 2009, 11:05 AM
earboth
Quote:

Originally Posted by eliteplague
Determine the equation of the line of symmetry of the quadratic function given bellow. <<<<< where or why?
https://ce6.howardcc.edu/webct/Relat...1/image002.gif
The equation of the line of symmetry is of the form x = k. What is the value of k?

How do I go about solving this?

-Thanks

I'm guessing:

The general form of the equation of the function is

\$\displaystyle y = a(x-k)^2+h\$

where k is the x-coordinate of the vertex and h is the y-coordinate of the vertex.