Apps. and Interpretation for IBDP Maths Ebook 1 | Page 32

Your Practice Set – Applications and Interpretation for IBDP Mathematics
3. Let
2
f ( x) 2x 14x
� � � . Part of the graph of f is shown below.
(a)
Find the x -intercepts of the graph.
(b) (i) Write down the equation of the axis of symmetry.
[4]
(ii)
Find the y -coordinate of the vertex.
[3]
4. Let
f ( x) 13.5 1.5
2
� � x . Part of the graph of f is shown below.
(a)
Find the x -intercepts of the graph.
(b) (i) Write down the equation of the axis of symmetry.
[4]
(ii)
Find the y -coordinate of the vertex.
[3]
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