OCR MEI C3 2013 June — Question 1

Exam BoardOCR MEI
ModuleC3 (Core Mathematics 3)
Year2013
SessionJune
TopicModulus function

1 Fig. 1 shows the graphs of \(y = | x |\) and \(y = a | x + b |\), where \(a\) and \(b\) are constants. The intercepts of \(y = a | x + b |\) with the \(x\)-and \(y\)-axes are \(( - 1,0 )\) and \(\left( 0 , \frac { 1 } { 2 } \right)\) respectively. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{28ce1bcc-e9d5-4ae6-98c0-67b5b8c50bc6-2_624_958_468_539} \captionsetup{labelformat=empty} \caption{Fig. 1}
\end{figure}
  1. Find \(a\) and \(b\).
  2. Find the coordinates of the two points of intersection of the graphs.