2025 A1 Accept oe Total 4 marks 9 2 M1 For = 2x + (c 1) or y c = + 1 y mx or for a correct method to find the gradient or = and = 1 stated m c −2 or + 1 or = 2x + 1 L −2x = 2x + 1 A1 y oe Total 2 marks a e.g.12x = 36 or 24y = 3 M1 for addition of equations a complete method to 10 or −60 eliminate or (condone one arithmetic error) y x e.g. 7 2y = 16 or M1 (dep) for method to find second variable ”3”+ 7x + 2 ×−2.5 = 16 3 oe, = A1 dep on M1 for both values correct. x = y −2.5 NB. Candidates showing no working score zero b + 9k 5k 45 2 M1 for 3 correct or all 4 terms correct ignoring signs or k2 – − + 4k +….. + 4k 45 or… y2 − + 4k 45 A1 k2 − 5 marks
2025 A1 Accept oe Total 4 marks 9 y = 2x + 1 2 M1 A1 For y = 2x + c (c 1) or y = mx + 1 or for a correct method to find the gradient or m = −2 and c = 1 stated or −2x + 1 or L = 2x + 1 oe Total 2 marks 10 a e.g.12x = 36 or 24y = −60 3 M1 for addition of equations or a complete method to eliminate y or x (condone one arithmetic error) e.g. 7 ”3”+ 2y = 16 or 7x + 2 ×−2.5 = 16 M1 (dep) for method to find second variable x = 3 oe, y = −2.5 A1 dep on M1 for both values correct. NB. Candidates showing no working score zero b k2 + 9k – 5k − 45 2 M1 for 3 correct or all 4 terms correct ignoring signs or y2 + 4k +….. or… + 4k − 45 k2 + 4k − 45 A1 5 marks