4(b) Odd B1 4(c) Either B1 5(a) Correct straight (if not drawn with a B3 B2 correct line but not from (0, to –1) ruler then intention to be straight) line (4, 7) for at least a continuous distance of x graph from (0, to (4, 7) with 1mm –1) 2. (½ square) tolerance B2 all integer points (any others must also Allow a dashed line be correct) between 0 and 4 plotted but line not drawn B2 correct but more than ½ square from tolerance Only one of these may be awarded. B1 straight line graph through (0, of any –1) length even if crooked later but not x = 0 or y = –1 B1 Single straight line graph with gradient 2 of any length B1 two correct points calculated (eg in table) or plotted Any line that is not straight is B0 although the B1 for two points calculated or plotted may still be gained 5(b) 1.5 B1 Correct (eg from algebra) or ft their graph if = 2 drawn to the graph and then a vertical y line to x-axis
4(b) Odd B1 4(c) Either B1 5(a) Correct straight (if not drawn with a ruler then intention to be straight) line graph from (0, –1) to (4, 7) with 1mm (½ square) tolerance Allow a dashed line B3 B2 correct line but not from (0, –1) to (4, 7) for at least a continuous x distance of 2. B2 all integer points (any others must also be correct) between 0 and 4 plotted but line not drawn B2 correct but more than ½ square from tolerance Only one of these may be awarded. B1 straight line graph through (0, –1) of any length even if crooked later but not x = 0 or y = –1 B1 Single straight line graph with gradient 2 of any length B1 two correct points calculated (eg in table) or plotted Any line that is not straight is B0 although the B1 for two points calculated or plotted may still be gained 5(b) 1.5 B1 Correct (eg from algebra) or ft their graph if y = 2 drawn to the graph and then a vertical line to x-axis