Steps for a graph of quadratic equation

The steps to draw a graph quadratic equation:

1.    You must know what the equation is. Usually the equation is ax² + bx² + c = 0 

2.    You must know that:

·        if ax² is an positive then the curve is upward

·        if ax² is an negative then the curve is downward

3.    You have to find the intersection point in x-axis, where y = 0

So you can get (c, 0); c is Constanta

4.   You have to find the intersection point in y-axis, where x = 0

So you can get (0, c); c is Constanta

5.    You have to find the extreme point, with the formula

HP = ( -b/2a , D/-4a) ; where the formula of determinant (D) is b² – 4 ac

6.   After that you can sketch the graph of x-axis & y-axis and plot the point.

7.   When you will to relate the lines from a point to other point, you must draw smoothly curved lines. 

Ewa Hanifa H.

2010110007