(3 marks) Total: 6 marks = 2 seen or implied. M1 y mx − M1 Substitutes their = 2 into y mx − o.e. M1 Rearranges to a 3 term quadratic in (condone one arithmetic error). x M1 Uses , A1 Rearranges to or any multiple of this. M1 Attempts solution using valid method. For example, A1 or o.e. (NB decimals A0). Total: 7 marks NOTES: Elimination of follows the same scheme. leading t x This leads to Use of gives which reduces to cannot equal 0, so this must be discarded as a solution for the final m A mark. could be used implicitly within the quadratic equation formula. Makes an attempt to find the vector. M1 For example, writing or Shows a fully simplified answer: A1 (2 marks) Correctly interprets the meaning of , by writing o.e. M1
(3 marks) Total: 6 marks y = mx − 2 seen or implied. M1 Substitutes their y = mx − 2 into o.e. M1 Rearranges to a 3 term quadratic in x (condone one arithmetic error). M1 Uses , M1 Rearranges to or any multiple of this. A1 Attempts solution using valid method. For example, M1 or o.e. (NB decimals A0). A1 Total: 7 marks NOTES: Elimination of x follows the same scheme. leading t This leads to Use of gives which reduces to m cannot equal 0, so this must be discarded as a solution for the final A mark. could be used implicitly within the quadratic equation formula. Makes an attempt to find the vector. For example, writing or M1 Shows a fully simplified answer: A1 (2 marks) Correctly interprets the meaning of , by writing o.e. M1
19725_02_as_pure_mathematics_practice_paper_a_mark_scheme.docx