Form 4 - Quadratic Function

The Graph of a Quadratic Function
The general form of a quadratic function is y = ax^2+bx+c. We have already
studied the graph of the parabola y = x^2. 

The graph of a quadratic function is called a parabola. The vertex is the
point where the parabola achieves its minimum, if it is upward facing, or its
maximum, if it is downward facing.

General form: ax^2+bx+c=0

where a, b, c are constant and a≠0

There are two cases in this topic:

-          a>0(graph is min)

-          a<0(graph is max)

 

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exersice :  http://www.scribd.com/doc/78990749/quadratic-function-question