Line must appear to be a tangent to the Straight line drawn B1 curve at the point 4 seconds in. Candidate to use straight line to find 5 metre increase M1 gradient. NOTE: their values may be 2.5 seconds different 18 (c) A1 Answers in range accepted. Additional guidance Ignore subsequent working to convert this into km/h if present. Total Distance = 55m M1 Changes distance to km 0.055km Total time = 5 secs M1 Changes time to hours 18 (d) hours or 0.055 720 M1 Computes the speed calculation × 39.6 km/h A1 CAO M1 Substitutes in 19 Yes, the solutions are either side of Any valid justification can be awarded -12 meaning that a solution lies in A1 full marks. Candidates do not need to the interval (-4, -3) the interval (-4, -3) state ‘in Q Answer Mark Comments Alternative Method 1 Multiples two brackets correctly. Must M1 show all four terms. A1 CAO Multiples previous expansion by M1 remaining bracket. Must show all 6 20 terms. A1 CAO Alternative Method 2 Multiples two brackets correctly. Must M1 show all four terms. A1 CAO
18 (c) Straight line drawn B1 Line must appear to be a tangent to the curve at the point 4 seconds in. 5 metre increase 2.5 seconds M1 Candidate to use straight line to find gradient. NOTE: their values may be different A1 Answers in range accepted. Additional guidance Ignore subsequent working to convert this into km/h if present. 18 (d) Total Distance = 55m 0.055km M1 Changes distance to km Total time = 5 secs hours M1 Changes time to hours or 0.055 × 720 M1 Computes the speed calculation 39.6 km/h A1 CAO 19 M1 Substitutes in Yes, the solutions are either side of -12 meaning that a solution lies in the interval (-4, -3) A1 Any valid justification can be awarded full marks. Candidates do not need to state ‘in the interval (-4, -3) Q Answer Mark Comments 20 Alternative Method 1 M1 Multiples two brackets correctly. Must show all four terms. A1 CAO M1 Multiples previous expansion by remaining bracket. Must show all 6 terms. A1 CAO Alternative Method 2 M1 Multiples two brackets correctly. Must show all four terms. A1 CAO
PiXL-AQA-2017-Spec-Paper-1H-Mark-Scheme-Nov-2016-PPE.docx