Question

Does the graph of y = x – 3x2 + 5 have a maximum or minimum?

What is the vertex of the graph of y = -2(x - 3)2 + 4?

Does the graph of y = -2(x - 3)2+ 4 open up or down?

Answer 1

I will be happy to critique your thinking on these; Post your thoughts on each one.

Answer 2

If you are currently studying the quadratic function and its graph, then these are fundamental questions that you should know.
If you are not studying the quadratic function then these pages are an excellent source

http://www.uncwil.edu/courses/mat111hb/Pandr/quadratic/quadratic.html

http://www.analyzemath.com/quadraticg/quadraticg.htm

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