A1 answer in range 6.5-6.6 16 Errors identified 2 B2 identifies 2 errors from: + 7 rather than + 6 (accept = for x y x y ≤ ≤ ≤) 0 rather than 0 (accept = for x y ≥ ≥ ≥) 2 rather than + 2 y x+ y x ≥ ≤ (B1 identifies one error) 17 (a) 21.4 3 M1 for using values 3.6 and 9.6 M1 for substituting values into trapezium rule, e.g. × 1 × ((3.6 + 9.6) + 2(6.4 + 8.4)) A1 cao (b) Distance in 2 C1 estimate of distance covered metres C1 in metres (c) 1 C1 under-estimate as chords are under curve
A1 answer in range 6.5-6.6 16 Errors identified 2 B2 identifies 2 errors from: x + y ≤ 7 rather than x + y ≤ 6 (accept = for ≤) x ≥ 0 rather than y ≥ 0 (accept = for ≥) y ≥ x+ 2 rather than y ≤ x + 2 (B1 identifies one error) 17 (a) 21.4 3 M1 for using values 3.6 and 9.6 M1 for substituting values into trapezium rule, e.g. × 1 × ((3.6 + 9.6) + 2(6.4 + 8.4)) A1 cao (b) Distance in metres 2 C1 estimate of distance covered C1 in metres (c) 1 C1 under-estimate as chords are under curve
17748_10b-Mock-papers-set-1-Paper-2H-mark-scheme.docx