Your Practice Set – Applications and Interpretation for IBDP Mathematics SE Production Limited 96 ( a ) ( i ) 2 540 ( 10 ) ( 10 ) a b c � � � � � A1 100 10 540 a b c � � � AG ( ii ) 100 10 500 a b c � � � A1 400 20 1980 a b c � � � A1 [ 3 ] ( b ) ( i ) 100 10 1 100 10 1 400 20 1 � � � � � � � � � � � � A A1 ( ii ) 540 500 1980 � � � � � � � � � � � B A1 ( iii ) 1 1 1 1 600 200 300 1 1 0 20 20 1 1 1 3 3 � � � � � � � � � � � � � � � � � � � � � � � A A2 [ 4 ] ( c ) 5 a � , 2 b �� and 20 c � For any one correct answer A1 For all correct answers A1 [ 2 ] ( d ) ( i ) The equation of the axis of symmetry : 2 2 ( 5 ) x � �� ( A1 ) for substitution 1 5 x � A1 ( ii ) The y -coordinate of the vertex 2 1 1 5 2 20 5 5 � � � � � � � � � � � � � � � ( M1 ) for substitution 99 5 � A1 [ 4 ] Solution