about quadratic function graph:
The eq should be
[tex]y = a {x}^{2} + bx + c[/tex]
where a b and c are constants.
the graph should be either a smile or a frown
steps :
1) Determine graph is smile (a>0) or frown (a<0)
2) find y intercept (x=0)
3)find x intercept (y=0: use factorisation, completing the square or formula)
4)use discriminant (b^2-4ac) to determine graph location and number of root.
5)Draw graph
