Apps. and Interpretation for IBDP Maths Ebook 1 | Page 29

Chapter
4
4
Quadratic Functions
SUMMARY POINTs
�
�
General form
Other forms:
1.
2
y � ax �bx � c , where a � 0 :
a � 0
The graph opens upward
a � 0 The graph opens downward
c
y -intercept
b
h �� x -coordinate of the vertex
2a
y -coordinate of the vertex
2
k � ah �bh � c
Extreme value of y
x
2
y a( x h)
k
� h Equation of the axis of symmetry
� � � : Vertex form
2. y � a( x � p)( x � q)
: Intercept form with x -intercepts p and q
Solutions of Chapter 4
www.seprodstore.com
19