Function's Vertex

[homebound]

Trying to find the function's vertex, whether it is at its minimum or maximum point, its zeros and sketch the function. The problem is y=-2x^2+18x

 

[tkhunny]

I'd start with "Completing the Square". What did you try, first?

 

[wjm11]

Trying to find the function's vertex, whether it is at its minimum or maximum point, its zeros and sketch the function. The problem is y=-2x^2+18x

You can learn about parabolas here (w/lots of good examples):

http://www.purplemath.com/modules/parabola.htm

And graphing quadratics/parabolas here:

http://www.purplemath.com/modules/grphquad.htm