12 shown 4 M1 for a method leading to the evaluation of another angle in triangle e.g. = 46 or = 180 113 (= 67) ABC, ABC BAC – A1 = 67 ACB C1 for all appropriate reasons related to method shown, e.g. vertically opposite angles are equal, angles on a straight line add to 180º, angles in a triangle add up to 180º C1 for concluding statement, e.g. = = 67° and isosceles ACB BAC triangle has two equal angles 13 No with 3 P1 starts process of comparison, e.g. writes two appropriate fractions comparison of or finds a percentage or works out a multiplier correct values P1 complete process to give values that can be used for comparison A1 No and comparison of correct comparable values (e.g. 80% and 76.7...% OR 44.8 (people) accept Yes with a suitable argument 14 = 2x + 1 3 M1 at least 2 correct attempts to find points by substituting or line y drawn drawn with gradient of 2 or line drawn with intercept at 1 y M1 at least 2 correct points plotted or line segment of = 2x + 1 y drawn A1 correct line between = 2 and = 3 x x –
12 shown 4 M1 for a method leading to the evaluation of another angle in triangle ABC, e.g. ABC = 46 or BAC = 180 – 113 (= 67) A1 ACB = 67 C1 for all appropriate reasons related to method shown, e.g. vertically opposite angles are equal, angles on a straight line add to 180º, angles in a triangle add up to 180º C1 for concluding statement, e.g. ACB = BAC = 67° and isosceles triangle has two equal angles 13 No with comparison of correct values 3 P1 starts process of comparison, e.g. writes two appropriate fractions or finds a percentage or works out a multiplier P1 complete process to give values that can be used for comparison A1 No and comparison of correct comparable values (e.g. 80% and 76.7...% OR 44.8 (people) accept Yes with a suitable argument 14 y = 2x + 1 drawn 3 M1 at least 2 correct attempts to find points by substituting or line drawn with gradient of 2 or line drawn with y intercept at 1 M1 at least 2 correct points plotted or line segment of y = 2x + 1 drawn A1 correct line between x = – 2 and x = 3
GCSE_Mathematics_3F_MS-1.docx